All Questions
Tagged with everyday-chemistry aqueous-solution
72 questions
-3
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1
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68
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I need to know whether Lead(II)Bisulfate is soluble because I couldn't find any information on it online [closed]
I need to know if Pb(HSO4)2 [Lead(II)Bisulfate] is soluble.
- 1
2
votes
0
answers
1k
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What is the resulting solution after leaching hardwood ash with water?
After doing online research, I've noticed there are differing interpretations on what happens when ash is mixed with water, so I've come here seeking clarification on what indeed happens, and also ...
- 21
8
votes
3
answers
1k
views
Sodium Chlorite Listed as Active Ingredient in Anti-Fungal/Anti-Bacterial Fish Medication
My hobby is Fish Keeping. About 6 months ago I picked up a medication called Maracyn Oxy. It's a non-antibiotic treatment for true fungal and some bacterial infections and it works like an absolute ...
- 125
3
votes
1
answer
519
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Is a diluted aqueous solution of sodium hypochlorite more stable than a concentrated solution, all else being equal?
On the Clorox website, they recommend that you dilute bleach (NaOCl) in water prior to use for disinfection. They say that you should make a fresh solution each time you need to use it, adding: “Don’t ...
- 159
2
votes
1
answer
4k
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Universal symbols for molar mass, molarity, and molality
This is a really basic (perhaps trivial) question, but I just want to confirm:
What are the SI symbols for molar mass, molarity, and molality? For molality and molarity, there is a difference, but I’...
- 99
0
votes
1
answer
1k
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Why do bubbles form and stay when I shake a bottle of tea?
I have some bottled tea and I noticed that shaking it creates some foamy bubbles that stay for quite a while (at least half an hour if not more). I originally thought it has something to do with my ...
- 141
1
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2
answers
1k
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Does carbonation permanently increase the acidity of soda water?
If you carbonate water, and then expose the resulting soda water to the atmosphere and wait until it goes completely flat, will the (former) soda water end up more acidic in final equilibrium than ...
- 121
0
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2
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59
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Composition of arcanite (potassium sulfate) agricultural grade. Potassium content of random drawn sample?
I bought potassium sulfate from this source:
Potassium sulfate granulate
I'm using it as a potassium additive in hydroponics. The composition is listed as K2O = 50%, S = 18%. This equals about 41.5% K ...
- 253
0
votes
1
answer
284
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Creating 100mg/L aspirin solution
I plan on creating 100 mL of 100mg/L aspirin solution by dissolving 10 mg of pure aspirin powder in 100 mL of buffer solution (of different pHs). Problematically, aspirin doesn’t tend towards ...
- 467
1
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0
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41
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Science of soap bubbles
On the web there are tons of different recipes for a solution to make soap bubbles.
Most of them use only three ingredients:
water
dish soap
glycerin
But their ratios widely change among the sources....
- 111
0
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2
answers
2k
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How much of Sodium dichloro-s-triazinetrione dihydrate should I use to replace bleach? [closed]
I am trying to determine how much sodium dichloro-s-triazinetrione dihydrate powder I should add to water to create a dilution that can be injected into my water supply to react with the Hydrogen ...
- 23
2
votes
2
answers
4k
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Potassium carbonate vs. Potassium hydroxide in Wood Ash
I'm trying to get more concrete information about the chemical process of creating soap from wood ash.
What I’m confused about: Many soap-making materials say that you create potassium hydroxide ...
- 23
8
votes
3
answers
2k
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How much salt (or any other substance one can find in a kitchen) do I need to add to make water boil at 104 °C?
I've seen some formulas around in other questions and Google searches, but my chemistry is pretty much dead so I have no clue where to find the relevant values to calculate it myself. I just need to ...
- 97
0
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2
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2k
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What happens when mixing elemental mercury with sodium hypochlorite solution [closed]
Say you spilled elemental mercury from a thermometer and used household bleach on it, what would be the reaction if any?
0
votes
1
answer
330
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Anhydrous magnesium sulfate to replace epsom salt?
Can anhydrous magnesium sulfate be used instead of epsom salt for feeding plants? Do hydrates and anhydrous salts become the same when dissolved in water?
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13
votes
2
answers
9k
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Why are synthetic pH indicators used over natural indicators?
Synthetic indicators seem to be exclusively used when determining the pH of a substance with an indicator (with the exception of that school experiment where you boil cabbage to demonstrate natural pH ...
- 143
2
votes
0
answers
265
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Mechanism for removal of pesticides from fruit by sodium bicarbonate
When Googling around for methods to remove pesticides from fruits and vegetables, a study commonly referred to from some news sites (e.g. here and here ) is one where soaking apples in a sodium ...
- 29
0
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0
answers
134
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Can a substance be extracted from solution by adding another substance with a higher solubility?
Suppose that I have a substance X dissolved in water. I then add a substance Y to the solution. Substance Y has a higher solubility in water than substance X, and more than enough of substance Y is ...
- 1,274
1
vote
0
answers
410
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How to make rheoscopic fluid using glycol stearate flakes
Rheoscopic fluid can be made by adding mica powder to water. I read that mica powder can settle and condense after sitting around for a long time. So I want to use glycol stearate flakes instead.
...
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-1
votes
1
answer
195
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Quantity of base needed to neutralise litre of 36% HCl?
Sorry for asking a basic chemistry question. I last did this kind of chemistry at school about 30 years ago and I don't have confidence that I'd get it right from first principles :)
Short version: ...
- 419
-3
votes
2
answers
4k
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Are most liquids water-based? [closed]
Is it that every liquid we see is water, with more or less of x substance?
Example: urine is water with salt and minerals
- 11
4
votes
1
answer
774
views
What component(s) of instant coffee make it deliquescent?
If I put small, separate piles of instant black coffee powder, sugar, powdered creamer, and even something very ionic like table salt out in humid air and come back in a few days, only the instant ...
- 5,997
2
votes
0
answers
194
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Why is fluoride good for your teeth?
The main component of tooth enamel is calcium hydroxyapatite. I know fluoride ions can replace hydroxide ions in the enamel matrix, slowing the rate of enamel demineralization. Why does hydrofluoric ...
- 353
2
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1
answer
3k
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What is a suitable acid to remove limewash from masonry brick
Diluted Hydrochloric acid is often touted as the only thing to remove limewash from masonry but the process is dangerous and can adversely affect the bricks, color changes can readily occur.
Is there ...
- 139
1
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0
answers
86
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Cationic Detergent with no odor [closed]
I am looking for a cationic detergent for a project. Unfortunately most ( or all?) cationic detergents are quaternary ammonium that smell like rotten fish or even worse
The product I am working on ...
- 2,141
4
votes
2
answers
4k
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Dangers of expired bleach?
I have some unopened Clorox bleach bought over a year ago (at $8.25~\%\ \ce{NaOCl}$) and read on Wikipedia that bleach naturally decomposes according to
$$\ce{3 NaOCl (aq) -> NaClO3 (aq) + 2 NaCl(...
- 1,566
3
votes
1
answer
14k
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Homemade "milk of magnesia" (suspension of magnesium hydroxide in water)
I want to make homemade "milk of magnesia" as a suspension containing only magnesium hydroxide and water.
I see that I can purchase a bag of magnesium hydroxide powder. Can I use this to ...
- 31
6
votes
1
answer
532
views
Could we reach a pH of 4.9 by blowing through straws?
According to Wikipedia's article on Breathing:
The permanent gases in gas we exhale are 4% to 5% by volume more carbon dioxide and 4% to 5% by volume less oxygen than was inhaled.
If I started ...
- 5,997
2
votes
0
answers
214
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Vacuum filtration: will Polymer elements interfere with the vacuum?
I am doing an experiment with vacuum filtration, where a Nylon filter is used to create a membrane (marked in pink in the picture attached). When I use the membrane, it frequently breaks in the ...
- 121
4
votes
1
answer
5k
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Temperature change and gas evolution for vinegar and baking soda experiment
This is sort of 2 questions in 1, but I think they are related.
Could someone please explain why this endothermic reaction doesn't further decrease the temperature when the amount of baking soda is ...
- 43
6
votes
2
answers
676
views
Will a film of oil on water retard evaporation (of water) and prevent air and atmospheric impurities from diffusing into it?
I vaguely recall hearing that a layer of oil on water will slow down the evaporation of water, as well as serving as a barrier that would prevent (or retard) the diffusion of air and atmospheric ...
4
votes
1
answer
1k
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Can Aquatabs be used to clean swimming pool water?
Can Aquatabs be used to prepare/chlorinate water for swimming? They are used to clean water for drinking so is it safe to assume that if used in proper quantity they can also clean water for ...
- 115
3
votes
1
answer
196
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Adding ethanol to louche
I'm watching MIT chemistry by Donald Sadoway. In one of his lectures devoted to solutions and phase separation, he performs experiments with absinthe.
First he mixes absinthe with 5 $\times$ water ...
- 143
50
votes
1
answer
9k
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Why doesn't frozen sugar solution taste sweet?
I'll try to make this as brief as possible:
Dissolved two teaspoons of table sugar (sucrose) in about 250ml water. Sipped it, and as expected it tasted sweet. I let the rest of it sit in the freezer ...
- 18.8k
0
votes
1
answer
3k
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Making artificial sweat
I'm currently working on a chemistry investigation wherein I need to dilute a compound with artificial sweat. I have looked at various forums, including this, which gave answers, but is very outdated.
...
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10
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2
answers
20k
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Can sodium bicarbonate be considered an acid?
I was reading about acids and bases today and finally decided to question the statement that "baking soda is a base."
Let's start with the dissolving of baking soda, $\ce{NaHCO3}$. The equation to ...
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0
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2
answers
10k
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Lugol's iodine 5 % aqueous solution
There is Lugol's 5 % solution with 5 g of pure iodine and 7.5 g of potassium iodide.
In one ml there should be 12.5 mg of iodine in sum.
But there are suggestions telling that two drops of this ...
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5
votes
1
answer
12k
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Reaction between sodium bicarbonate (baking soda), isopropyl alcohol, and acetic acid (vinegar)?
I observed this reaction by playing around with vinegar and baking soda and I do not completely understand it.
Everyone knows that baking soda (sodium bicarbonate) and vinegar (acetic acid) go crazy ...
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2
votes
2
answers
12k
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What is the yellow precipitate formed from reacting diamminsilver fluoride and potassium iodide?
These two compounds, silver diamine fluoride and potassium iodide (actually a solution called Lugol’s solution), are being used together in dentistry.
When combined they form a yellow precipitate. I ...
- 21
2
votes
1
answer
681
views
Why is brine solution more effective than granular salt in melting ice on a surface?
Why is a brine solution consisting of a small fraction of salt in water, more effective in melting ice on a surface, than just pure salt?
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11
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4
answers
8k
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Does the mass of sulfur really decrease when dissolved in water and increase when burnt?
I was going through a bunch of interesting science 'facts' and one entry went this way:
Name an element whose mass decreases when it is dissolved in water and increases if it is burnt.
I tried ...
- 1,417
9
votes
1
answer
293
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Why Is This The Worst Beer Cup
My wife bought me a special cup for me to drink beer out of. The problem is that, if I pour any beer in it, it goes crazy with foam. I will get just a few ounces of beer in there and the rest of the ...
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29
votes
1
answer
2k
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Why did the Rio 2016 pool water turn green?
One of the swimming pools at Rio 2016 Olympics has turned green:
While proliferation of algae is a likely culprit, there have been some alternative explanations offered by local organizers. CNN has ...
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4
votes
3
answers
8k
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How can I keep homemade laundry detergent from disassociating?
We've been using this recipe to make laundry detergent. Works fine, but after a few days it disassociates into a clear bottom layer and a pink top layer. It's mildly annoying to have to re-stir it ...
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9
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2
answers
33k
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What happens to the bleach after mopping?
At home, I clean the tiled floors by mopping with highly diluted bleach. After mopping, I let the floor dry. What happens to the acid in the bleach?
Will it crystallize on the floor, stay there ...
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4
votes
1
answer
474
views
Does carbonated water change over the course of several days, or was my container leaky?
I have a Klean Kanteen flip-top growler, allegedly leakproof at up to 35psi of pressure, that I filled with some freshly-carbonated water 4 days ago — just to see how long it would last. I used a Soda ...
- 149
2
votes
1
answer
4k
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How could chlorine dioxide be stabilized in aqueous solution?
There is a water-based mouthwash product which is advertised as having the ingredient "stabilized chlorine dioxide." The only other listed ingredients are trisodium phosphate and citric acid. I assume ...
- 123
3
votes
1
answer
5k
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Hand Sanitizer Chemical Changes
I keep a bottle of hand sanitizer on my desk at work, as I touch a lot of things throughout the day. When I used it yesterday, a bit must've been left in the pump track or opening. So I was about to ...
- 31
5
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1
answer
3k
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Why does pouring soda slowly and smoothly seem to keep more of the carbonation?
So, I caught myself gently pouring a can of soda into a cup of ice (making sure that there was room for air to move through so the stream of soda from the can to the cup was consistent and even) ...
- 365
6
votes
1
answer
1k
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Why is glycol used as an antifreeze?
Lowering of the freezing point on adding a solute is a colligative property of solutions, it doesn't matter what the nature of the solute is (of course we have to assume ideal solutions). So when it ...
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