Questions tagged [aqueous-solution]

For questions relating to compounds dissolved in water and resulting reactions.

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1answer
3k views

How can proteins reduce surface tension?

How can the protein lactalbumin reduce the surface tension of water and work like an emulsifying agent in milk?
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1answer
143 views

Why don't we take into account the auto-protonation of water when measuring its concentration?

When we calculate the concentration of water at $ 25~^\circ\rm C $, why don't we assume dissociation of water at this temperature? $$\ce{H2O <=> H+ + OH-}$$
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1answer
3k views

Where does the energy in the exothermic reaction of CaCl2 with water come from?

Today I created $1~\mathrm{M}$ aqueous solution of $\ce{CaCl2}$ and realized that the water before the mixture had a temperature of 23.4 Celsius degrees. Then I added the $\ce{CaCl2}$ and the ...
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0answers
28 views

Valoration citrate and acid in syrup [closed]

If i have acid citric monohidrate (5/100), potassium citrate monohidrate (30/100), sodium benzoate(0.06/100), and percloric acid, i need to know the reaction in acuoso solution. My valoration of ...
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1answer
35 views

What formula allows adjusting balance of (Ethyl Alcohol / Water / Caffeine powder) to know concentration for the Caffeine solution?

I am experimenting with different levels of concentrated caffeine solution. The solution has a small percentage of ethyl alcohol, in the $\ce{H2O}$. Problems encountered too much ethyl alcohol ...
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2answers
1k views

Why doesn't ethanol dissolve in sodium bicarbonate?

Today I experimented with different solvents and solutes and was a bit surprised by one result. When I added ethanol to dilute sodium bicarbonate and tapped the test tube against my palm to mix it, I ...
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1answer
33 views

How can I reduce sodium chloride levels in water, without removing other minerals?

How can I reduce sodium chloride levels in water, without removing other minerals? Good day, I make a sole from Himalayan Salt which I add to my Reverse Osmosis treated water to ensure my body isn't ...
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1answer
90 views

Polyprotic Acid Titrations

Titrating a mixture of strong and weak acids will yield endpoints such that the volume of base required to reach each endpoint will be different for each acid, e.g. in a mixture of HCl and CH3COOH, ...
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1answer
26 views

Can I have a homogeneous 2 molal solution of copper(II) sulfate at 20 °C?

I'm doing a high school chem project where I am making a calibration curve of copper(II) sulfate for spectrophotometry in which I make solutions with five different concentrations. The most ...
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1answer
36 views

Will a reverse osmosis membrane exclude perfluorobutanoic acid?

I recently did a water quality test and it showed a detectable level of perfluorobutanoic acid, a potentially dangerous carboxylate PFC. Will a reverse osmosis water purification system exclude this ...
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1answer
200 views

Reaction of soluble salts

If we were to mix two soluble salts together, for instance sodium nitrate and potassium chloride together, and their products are also soluble, will any reaction still occur? Say if we were to boil ...
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1answer
76 views

How does the water pollutant sodium nitrate affect the concentrations of other ions in tap (dam) water? [closed]

Context In my assignment I've been given two water samples from the hinze dam. The first sample has been untouched, however the second has been contaminated with an unknown ionic compound. To ...
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2answers
2k views

KCl + CuCl2 in solution, is there a reaction?

I'm wondering if the reaction of $\ce{KCl + CuCl2}$ in solution (aq) will produce any products (have a net ionic equation/solid precipitate)? Using the metal activity series, I see that potassium is ...
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2answers
2k views

Is it necessary to write state symbols in ionic equations and if so, why?

I understand that it is necessary to use state symbols in an equation with compounds shown, such as: $$\ce{NaCl(aq) +AgNO3 (aq) -> NaNO3 (aq) +AgCl(s)}$$ But is it necessary to use state symbols ...
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1answer
186 views

Why is the strong acid written in a net ionic equation? [closed]

Strong acids dissolve and break apart into ions, so in a net ionic equation, why are they written?
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1answer
665 views

Are concentrated salt solutions stable over time?

I have to use dilute salt solutions incredibly frequently, and it takes valuable time to make them from pure reagents every time I need them. Are concentrated salt solutions fairly stable over time? ...
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1answer
34 views

How can I get create complex metal ion solution such that the majority of the central metal ions only have one specific ligand?

I'm looking for a way to have the ligand, Chloride ion, datively bond with Copper Sulphate. I understand it is as simple as creating a solution of Hydrochloric Acid and dissolving Copper Sulphate ...
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1answer
111 views

Determine concentration of phosphate after copper(II) oxalate is precipitated

Solution with $\ce{Na3PO4}$ with $\pu{0.02 M}$ concentration and $\ce{Na2C2O4}$ with $\pu{0.03 M}$ concentration. I add excess $\ce{Cu(NO3)2}$ very carefully – tiny amounts. What will be my $\ce{PO4^...
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1answer
114 views

Loaded and unloaded solutions

What is the difference between a loaded solution and an unloaded solution? I was reading this article and I didn't understand these parts: The reaction kinetics of $\ce{CO2}$ with loaded aqueous ...
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3answers
799 views

An aqueous solution of NaCl has a mole fraction of 0.21. What is the mass of NaCl dissolved in 100.0 mL of solution? [closed]

Work mole fraction of NaCl = 0.21/0.21+0.79 If there is 1 mol of total solution, there will be 0.21 mol NaCl and 0.79 mol H2O 0.21 mol NaCl = 12.27 g 0.79 mol H2O = 14.23 g this would yield a ...
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2answers
4k views

How to tell the pH of HC2H3O2?

Find the $\mathrm{pH}$ of a $\pu{0.500 M}$ solution of $\ce{KC2H3O2}$. I am preparing for an exam on equilibrium and I have two questions: How would I go about calculating this? Is the $\ce{H3O}$ in ...
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2answers
926 views

Difference between some terms relating to liquids

So my chemistry teacher, when she talks about liquid substances she talks about them in reference to 3 words. She refers to liquid substance with one of these 3 words- 1)Aquesous form 2)Solution ...
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2answers
3k views

If NaCl dissociates when in water, why don't we see Chlorine gas escaping?

I've always been a little confused about the whole process of ions dissociating in solutions. When salt dissolves and splits into Na+ and Cl-, shouldn't the Cl- ion still be gaseous? And shouldn't we ...
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1answer
91 views

How do I get a 20% ratio of sodium bisulfate with 1 gallon water? [closed]

How many lbs do I add to 1 gallon of water to get a 20% sodium bisulfate ratio? I am in the middle of anodizing some aluminum.... I just threw the whole 3 lbs in... hopefully it works... I ended up ...
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1answer
101 views

Do bases undergo dissociation or ionisation in aqueous solution?

What do bases undergo when dissolved in water: ionisation or dissociation or both? Some books say ionisation while others say dissociation. What is the correct answer?
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1answer
47 views

Peroxide without hydrogen [closed]

How come we always see hydrogen peroxide and never peroxide by itself. Is there such a thing as peroxide ? Does this exist in nature? Why is hydrogen always associated with it? Please note: First ...
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1answer
1k views

Calculating pH of solution of phosphoric acid and ammonia

What is the $\ce{pH}$ of the solution created when $\ce{50ml}$ of $\ce{0.2M}$ $\ce{H3PO4}$ is mixed with $\ce{50ml}$ of $\ce{0.4M}$ $\ce{NH3}$? This problem can be approached rigorously. That's what ...
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1answer
452 views

Is it possible to synthesize magnesium nitrate through an aqueous solution of ammonuim nitrate and magnesium sulfate?

Is it possible to synthesize magnesium nitrate through an aqueous solution of ammonium nitrate and magnesium sulfate? I am attempting to determine whether the sulfate or nitrate radical has a higher ...
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1answer
4k views

How do you write the ionization equation for calcium hydroxide?

This is a base that would ionize completely, and the dissociation equation would look like this: $$\ce{Ca(OH)2 <--> Ca^2+ + 2OH-}$$ but how would I write the Brønsted equation with water? $$\ce{...
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1answer
1k views

If Ag2SO4 dissociates into 2Ag+ and SO4^2-, Why doesn't SO4^2- dissociate into oxygen and sulphur? [duplicate]

When $\ce{Ag2SO4}$ dissociates it becomes $\ce{2Ag^+}$ and $\ce{SO4^2-}$ Why doesn't the $\ce{SO4^2-}$ dissociate further into oxygen and sulfur?
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2answers
77 views

What do we call ions without basic and acidic properties

According to Brønsted theory, Acids are substances (molecules and ions) donating $\ce{H+}$ Bases are substances (molecules and ions) receiving $\ce{H+}$ I've been trying to find a complete Brønsted-...
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1answer
223 views

Molarity of silver(I) nitrate solution after the reaction with magnesium [closed]

$\pu{3 g}$ of $\ce{Mg}$ are placed in $\pu{500 mL}$ of $\pu{0.625 M}$ $\ce{AgNO3}$. When the reaction is complete, what is the molarity of the $\ce{AgNO3}$ solution? I'm thinking you need to use $...
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2answers
1k views

Converting mass percentage of a solution into its density? [closed]

Is there a way of converting mass percentage of a solution to obtain its density? (With mass percentage been given and the compounds which are mixed to form the binary solution)
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1answer
574 views

What's the role of sodium carbonate and hydrochloric acid for the neutralization of disaccharides into monosaccharides?

A couple of days ago we conducted the following experiment at school: Add 5mL of an aqueous solution of sucrose ($\ce{C6H22O11}$) to 1mL of concentrated hydrochloric acid and heat it for 10 minutes....
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2answers
12k views

What is the solution and the solvent in 80% solution of ethanol in water?

I was wondering whether the solvent is water or ethanol, I think it must be ethanol because it is present in larger quantity; however, on the other hand water is the universal solvent so shouldn't it ...
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1answer
164 views

Find the concentration of proton after adding a acid to NaOH [closed]

I have this simple problem that I cannot figure out though, only the first part. 100 ml of 1.0 $\frac{mol}{L}$ $NaOH_(aq)$ contains ( a ) g of NaOH. After mixing 100 ml of 1.0 $\frac{mol}{L}$ $...
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2answers
300 views

Are aqueous solutions of oxidizing agents safe? [closed]

In the "reducing agent" article in Wikipedia it says Good reducing agents are reagents that deliver $\ce{H2}$. Wouldn't that make water unsafe to dissolve oxidizing agents?
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1answer
836 views

What are the products of the double displacement reaction of oxalic acid and cesium hydroxide?

A solution of oxalic acid is mixed with a solution of cesium hydroxide. This chemical reaction requires double displacement. I got this as my chemical equation: $$\ce{C2H2O4 + CsOH -> H3O + CsC2O4}...
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2answers
46 views

How would I separate a solution of sodium iodide and water in order to obtain the sodium [closed]

I am an amateur in this field of science and I am trying to separate a solution of Sodium Iodide and water. How would I separate the solution so I can obtain sodium?
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1answer
64 views

aqueous solution recipe calculations: Using oxy-bleach as surface sanitizer [NOT A PERSONAL HEALTH QUESTION] [closed]

NOTE: Please do not delete this question. It is not a personal health question. The question has broad utility, in cases where others find themselves in social-distancing or quarantine with need for ...
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2answers
340 views

How does a glow stick work [duplicate]

I understand that when the glow sticks snaps, it produces light, and that process is called triboluminescence. But I don't understand how that works
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0answers
34 views

What alternatives to ethanol are there for washing stuff in a centrifuge? (It's corona time) [closed]

With the coronavirus inflating the market for ethyl alcohol / ethanol by almost 500% (it's used in hand sanitizers), what are some good semi-polar solvents to use to wash materials in a centrifuge? I'...
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1answer
43 views

double replacement [closed]

$$\ce{KNO3(aq) + BaCl2(aq) -> KCl(aq) + Ba(NO3)2(aq)}$$ I found products but I noticed in product that both of them are in the aqueous phase. So actually no reaction occurs? Does a reaction need ...
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3answers
584 views

Can you create pure sodium metal by electrolysis of aqueous NaCl rather than molten NaCl?

I was researching how to make pure sodium from salt because I think it would be interesting to do. In all of the articles I read that talked about using $\ce{NaCl}$ they said to melt it and then use ...
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1answer
799 views

How is the dichromate anion generated from potassium dichromate? [closed]

How does $\ce{K2Cr2O7}$ become $\ce{Cr2O7^2-}$ when dissolved in water?
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2answers
2k views

Why does acetic acid (CH3COOH) conduct electricity the worst in comparison to HBr, HCOONa and NaNO3 [closed]

Which of the given substances (in an aqueous solution) conducts electricity the worst: $\ce{CH3COOH}$, $\ce{HBr}$, $\ce{HCOONa}$ and $\ce{NaNO3}$? I've found this assingment included in the 2017 ...
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4answers
240 views
+100

How does sodium carbonate raise pH?

Sodium carbonate is used in pools to raise pH. From my understanding, it would dissociate in water like so: $$\ce{Na2CO3 <=> 2 Na+ + CO3^2-}$$ To raise pH, doesn't it have to absorb hydrogen ...
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1answer
590 views

What are the dangers associated with a copper sulfate CuSO4 + Water H2O solution aprox 5 gallons at room temperature in a room with no ventilation.

Will there be hazardous gases in the room? is the evaporation of this solution harmful in any way to animals or humans?
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0answers
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Which of the following would be a strong electrolyte in solution? [closed]

Which of the following would be a strong electrolyte in solution? KCL Al(OH)3 PbI2
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1answer
849 views

Is Phosphate (PO4 3-) solube in water? [closed]

Josh~ Superphosphate is used instead of just phosphate because superphosphate is a compound whereas phosphate is an ion. This means that phosphate must attach itself with a cation in order to give a ...

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