Questions tagged [home-experiment]

For questions about a small-scale experiment which can be undertaken with reagents readily available around the house, while observing standard laboratory safety principles and practices. Do not confuse this tag with [everyday-chemistry] or [food-chemistry].

81 questions with no upvoted or accepted answers
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7
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146 views

What acid did I accidentally create, and how?

So, I wasn't trying to do a chemistry experiment this evening; it was entirely unintentional! I was mixing up a batch of fertilizer for my plants (no nitrates involved, so I wasn't worried about ...
6
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0answers
690 views

Sugar burning with the assistance of ash

If a plain pile of sugar (or a sugar cube) is heated with a torch, it just melts and gives off smoke. However, if some paper or wood ashes are added, it burns quite easily. What are the ingredients of ...
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96 views

Reaction of Rubidium with vacuum system viewport

I have a vacuum system ($<1\times10^{-7}$ mbar) filled with Rubidium ($^{87}$Rb) vapour, at room temperature. We also have a viewport near the Rubidium source, made of a stainless steel flange ...
5
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0answers
70 views

Fractal patterns on water

I stored water in a bucket (of aluminium probably), and some random fractal-like patterns are formed on the water: See here for some more pictures. Why this happened? I'm unable to reproduce it. ...
5
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2answers
286 views

How to measure saturated salinity and mineral levels for flaked sea salt?

I am a sea salt enthusiast looking to make the perfect flakey sea salt. I start with sea water and boil it down to a thick brine. Then with less heat I reduce the brine more slowly and inverted salt ...
4
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0answers
129 views

Waterproofing and recycling paper

I've recently begun studying about waterproofing paper. Through what I learned is that the reason why paper absorbs water so easily is mainly because of it's material composition. Paper is generally ...
4
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0answers
464 views

Why does the open circuit voltage of a battery decrease with increase in pH of electrolyte, but the voltage across a load increase?

I tested a cell which had aluminum sulfate as its anode electrolyte (12 grams aluminum in 50 mL water and a pH of 3.2), and potassium hydroxide as the cathode electrolyte (5 grams of KOH in 200 g of ...
4
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0answers
1k views

Home science optical absorption test for approximate caffeine quantity in coffee?

I started with How can you measure the caffeine content of a liquid at home? in the cooking stackexchange, but the test strips were only qualitative (yes/no) and don't seem to exist anymore, and the ...
4
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0answers
685 views

Salt crystal growing inside a mold inside a jar

I have recently found an experiment where you can grow a salt crystal on a jar. The experiment works like this: we take a jar, fill it with hot/warm water and start dissolving salt in it until it ...
4
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0answers
1k views

How to break down soap and detergents?

I am building a greywater harvesting system. It is a 3-stage system: The 1st stage breaks down soap and detergents. The 2nd stage filters the water. The 3rd stage pumps water out of system. What ...
3
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0answers
31 views

Molar ratios not leading to complete reaction in Schweizer's reagent production

In my home lab, I've reacted $\ce{Cu(OH)2}$ with aqueous ammonia to produce Schweizer's reagent. However, I'm surprised by the amount of ammonia required to react with this amount of $\ce{Cu(OH)2}$. ...
3
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0answers
110 views

Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
3
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0answers
287 views

Dubowski’s Formula vs Henry's law applied to alcohol sensor 'calibration'

I'm working with some hobby-level gas sensors and I've run across a "calibration" system I don't understand. A general description of this kind of gas sensor is described a bit more in this question ...
3
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0answers
74 views

Safety regarding multiple metals in same acid solution

My son is testing the corrosion of metals in various solutions. Is it okay to place strips of multiple metals in the same container of a specific solution? Metals being tested: $\ce{Fe}$, $\ce{Cu}$, $...
3
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1answer
90 views

Products of silicate synthesis

I'm attempting to make a hard refractory cement to apply over kiln brick made of sodium silicate and Perlite. This creates a very good kiln brick, however they are susceptible to abrasion. I've been ...
3
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58 views

Silicon degassing with negative pressure

I am planning to use polydimethylsiloxane (PDMS) to create phantom for mimicking tissue for imaging. For this, I plan on using SYLGARD® 184, which is a viscous liquid. When adding other components to ...
3
votes
1answer
630 views

Gases produced by bacterial decomposition of human urine

I know that when urine (more specifically, the urea within) is metabolised by bacteria, ammonia is released. However, because of the high solubility of ammonia, I assume it simply dissolves into the ...
2
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2answers
121 views

Why is my sodium acetate not resulting in any crystals?

My son received a chemistry set for Christmas and we've been working through the experiments over the last few weeks. One of them involves boiling white vinegar and adding baking soda to produce ...
2
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0answers
85 views

What is the reaction involved in a childrens paper Christmas tree crystal growth?

For Christmas I bought my children a "Magic Growing Christmas Tree Crystal Paper Tree Christmas Decoration Science Toy". It looks like this: It came with a bag of liquid which you add to the tray at ...
2
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0answers
403 views

What chemicals are in hard wood ash? (Making lye)

I am trying to make lye or potassium hydroxide. So far I have been leaching ashes in a barrel for a few days. I decided to do some tests on the water to see if it was working. My pH paper said it was ...
2
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0answers
81 views

Is suckback possible after removing stopper?

I am making hydrogen gas to fill a balloon. I will run the gas to a washing bottle with $\ce{NaOH}$ and then connect the balloon. I was wondering what would happen if I removed the stopper of my main ...
2
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0answers
333 views

Unknown white stuff from eggshell reaction with acids and bases

I have just finished some experiment at home using tea eggs. First I peel off the shell of the tea egg and place it in a bowl of white vinegar (of course, I consumed the rest of the egg). Not ...
2
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0answers
236 views

Starch gelatinization, retrogradation and disgestability

Over on the sub-reddit on prebiotics we're a bit stumped on figuring out the process for turning raw potato starch (mainly containing R2 resistant starch) into R3 via retrogradation/gelatinization. ...
2
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0answers
217 views

Processing Chitosan from Crab Shell

I am trying to extract chitosan from crab shell (Japanese snow crab). I want to dissolve chitosan in water and mix in gelatin to obtain some type of gel, that I would then test for my Master 2 ...
2
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0answers
613 views

Mechanism of action for Citric Acid as a cleaning agent for limescale?

This may be a silly question, but I am not that certain I understand this process because of the low solubility of Calcium Citrate. How does citric acid actually clean limescale? How much limescale ...
2
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0answers
70 views

Composition of carbon rods in alkaline batteries

The carbon rods in batteries look somewhat similar to graphite, but they do not leave a significant mark on paper. What form of carbon are they? Are they simply just graphite with a large amount of ...
2
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0answers
58 views

Is it possible to observe ATP energy transport in table experiment?

Is it possible to take AMP or ADP, then phosphorylate it convert to ATP to charge with energy, then transport to other place an then observe energy freeing? In table / home / school experiment?
2
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0answers
613 views

Efficient oxidation of KCl to KClO3

I am trying to convert $\ce{KCl}$ to $\ce{KClO3}$ through an efficient process. I realize that I could electrolyze a solution of $\ce{KCl}$ to obtain some $\ce{KClO3}$ as a precipitate, however this ...
2
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0answers
700 views

What would be a safe/good surfactant for ultrasonic cleaning vinyl records + distilled water and isopropyl alcohol

Title pretty much says it all besides the type of records I believe are pvc (60s - current, someone correct me if there may be other materials but I absolutely don't have any shellac records) and I ...
2
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0answers
53 views

Dismutation of ethanoic acid

Ethanoic (acetic) acid can undergo fermentation by methanogens to create $\ce{CH4}$ and $\ce{CO2}$. Is there any way that I could perform this reaction without any microorganisms, specifically with ...
2
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1answer
248 views

Lead(II) oxide CRT monitor extraction

I have a large CRT monitor that, by the weight of the monitor, I estimate to contain over two pounds of lead. I want to know if the lead oxide is a mixture with the glass, or if it is chemically ...
2
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0answers
45 views

How can I test if a spirit (tequila) has oxidised?

Is there a way to test if tequila has oxidised and if so the level of oxidisation? It would be best if this could be done without a control sample, but the most important thing is if I can do this ...
2
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0answers
403 views

How do I measure the density of a cellulose acetate membrane?

I've been playing around with filtration methods, and got my hands on a casting machine for this purpose. My first mission was to find out how porosity can affect filtration. To see this for myself, ...
2
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0answers
421 views

Analysis of a mixture of carbonate salts

We've got a mixture of carbonate salts. It's a buffer, used in fish tanks. How might we go about identifying the components and their concentrations? I suspect it'd be hard to separate some of this. ...
1
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2answers
91 views

Thickening and/or slowing evaporation of IPA-based ink

The conundrum I have a security printing ink that I make by adding an IR-absorbing dye to a 50/50 mix of Isopropyl Alcohol and distilled water. The ink solution is pale green but dries virtually ...
1
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0answers
61 views

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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0answers
57 views

What governs the amount of smoke produced by an extinguished match?

First Chemistry question, so apologies if this isn't quite in the spirit of this SE. I have noticed that when extinguishing a lit match by blowing it out, the amount of smoke produced can vary widely....
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0answers
56 views

Reaction of heated cupro-nickel in isopropanol or methanol

There are a number of youtube videos where someone heats a US quarter (which is copper sandwiched between layers of 75% copper, 25% nickel) to red heat and cooling it in methanol. This results in a ...
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0answers
37 views

Colorimetry at home?

Is there a reasonably priced option for colorimetry at home? Is this even a good option to accomplish my goal? I'd like to roughly determine the concentration of a chemical in an ethanol extract from ...
1
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0answers
577 views

How can I convert lidocaine HCL to lidocaine base

So I'm a hobbiest, no pro. I've got a formulation for a topical anesthetic I'm trying to mimic. It calls for lidocaine, ethoxydiglycol (aka. diethylene glycol monethyl ether) and a couple of oils. ...
1
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0answers
290 views

Multi-solvent recrystallization to extract solute from glycerol?

I have compound A contaminated with impurity B. Recrystallization in water would not yield pure compound A since impurity B is less soluble in it. The only solvent in which substances A and B have ...
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0answers
32 views

failed simple experiment with surfactant

I wanted to show my son the effect of a surfactant. So I filled two small glasses with tap-water, added a squirt of RinseAid to one and stirred. Then I sprinkled powdered flour on both. My ...
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0answers
167 views

Windex and Red wine

The other day I was cleaning my counter tops with windex. There was a couple red wine (cabernet sauvignon if it makes a difference) stains from the night before and the stains turned an gray/blue ...
1
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0answers
28 views

What is the most simple way to cut through a steel with very thin aluminum coating to obtain cross section without damaging the coating?

I needed to take cross section characterization of an aluminum coating. I tried to use a hand saw to cut through it, but it destroys the coating, and usually is separated with the substrate as I ...
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0answers
33 views

How to safely change the color of a fire tornado?

So I've been watching a lot of fire tornado videos and I came across one that had a reasonable and safe setup (around the 3:23 mark): Fire Tornado DIY Is there a way to change the color of the fire ...
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0answers
292 views

Platinum-coated razor blades for making a fuel cell

My daughter wants to construct a fuel cell for a school project. Budget is tight and platinum as preferred catalyst expensive. I know that Gillette razor blades are coated with platinum. Would there ...
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0answers
211 views

What is substance that has high melting point in its powder form?

In laminated glass bending process 2 glass sheet will be superposed in a furnance.The seperation powder will be interposed between layer for avoid 2 glass sheet being bound together. I'm trying to ...
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0answers
147 views

Elephant Toothpaste demo: How to concentrate hydrogen peroxide (freezer?)

I would love to do an 'elephant toothpaste' demo in my Chemistry classes this week, but I do not have enough time to order 30% $\ce{H2O2}$ from a supply company. I have been reading (and seeing on ...
1
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0answers
49 views

Is it a good idea to build a small scale ozone AOP reactor in my garage?

I have some interesting findings from my work (no conflict of interest), and I have been thinking to build an ozone lab in my garage to verify my ideas. What safety issues should I be aware of? The ...
1
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0answers
64 views

Jamming Theory or DLVO Theory for Oobleck

After doing some research I came across two theories that explain the shear thickening effect of Oobleck. The DLVO theory which involves the suspension of molecules via two opposing forces [...