Questions tagged [aqueous-solution]

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

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What is the maximum molarity of aqueous HCl?

Here is a problem a made up: We have some aqueous $\ce{HCl}$. What is the maximum possible molarity of the $\ce{HCl}$? How do I solve this? I don't have any good ideas.
569 views

How to find the mass of dissolved AgCl when placed in a solution of NaCl?

I think the following problem in my textbook is malformed: Solid $\ce{AgCl}$ is placed in $1\,\mathrm{L}$ of $0.55\,\mathrm{M}$ $\ce{NaCl}$. Find the mass of $\ce{AgCl}$ which dissolves. I know ...
297 views

Ionic equilibrium equation [closed]

What form is the ionic equalibrium equation? I have problem asking for it, but I'be done so many different equalibrium equations that I'm starting to get mixed up on which one is called what... Which ...
294 views

Ionize Hydrogen and Oxygen Gas in Electrolytic Cell?

As is well known, water can be electrolyzed into oxygen and hydrogen gasses. However, all redox reactions can be run in reverse. If I were to electrolyze water in 2 closed containers (in order to trap ...
1k views

Diluting down solutions method

I'm designing an experiment and it involves testing various concentrations of solutions, and I will be testing 5 in total. I proposed to make up a stock solution, and distribute it evenly in 5 ...
4k views

What gas is released during dissolving NaOH

What gas is released during dissolving solid $\ce{NaOH}$ in a high purity water? Water more than 10 M$\Omega$/cm and standard quality $\ce{NaOH}$.
603 views

Calculating the Molarity of an Ion?

I'm completely stuck on this one - I was doing an experiment in a lab and now I cannot find the molarity of an ion in a solution. I've looked everywhere on the web but after 2 hours of searching I ...
1k views

Carbonic acid-hydrogencarbonate buffer system pH calculation?

I am learning about the pH of buffer solutions, and am slightly confused by my text book's calculation. For the blood's buffer system of carbonic acid and hydrogencarbonate ions as the conjugate case, ...
1k views

Is sodium hypochlorite solution an ionic solution - does it conduct current?

Does an aqueous solution of sodium hypochlorite conduct current?
14k views

Is the dissolution of sodium acetate trihydate endothermic?

Sodium acetate trihydrate dissolves in water to its constituent ions: $$\ce{NaOAc.3H2O (s) ->[H2O] Na+ (aq) + OAc- (aq) + 3H2O (l)}$$ The crystallisation of sodium acetate from a supersaturated ...
170 views

Boiling aluminum in high-alkalinity water

This question ultimately relates to brewing beer, but more specifically to water treatment before brewing. Though I can't get a water quality report, I suspect I have high levels of bicarbonate ...
40 views

Weighted Drilling Fluid Comparison with CaCl₂

I asked a question previously, and the answer was quite illuminating. The answer ushered me forth in a direction that finally made sense. I ended up finding this website, chem.latech.edu/~ramu/cmen522/...
12k views

Solubility of Noble Gases

I read this statement that: Xenon is the most soluble noble gas in water. My first doubt is: Why does the solubility of noble gases in water increase down the group? Even if this is the trend, ...
757 views

How does one measure the change in enthalpy of hydration?

I am learning about lattice enthalpies, and my textbook talks about determining the lattice enthalpy from the standard change of enthalpy of solution and the change of enthalpy of hydration of the ...
103 views

Why don't water molecules react alongside aqueous reactions?

To explain my question I'll use an example: We all know that sodium displaces copper in a solution of its sulfate in the reaction: $$\ce{2Na (s) + CuSO4 (aq) \rightarrow Na2SO4 (aq) + Cu (s)}$$ My ...
442 views

Methylene blue used as funguscide in cichlid reproduction - concentration measurement?

I have an aqueous solution of methylene blue. How do I determine the concentration of this solution, so I can duplicate it?
4k views

How to convert sodium aluminate back to sodium hydroxide?

I had dissolved a bunch of aluminium foil in an aqeous solution of sodium hydroxide. The resulting solution consists mainly of sodium aluminate with very little excess sodium hydroxide. What I want to ...
2k views

Can artificial sea water be prepared by mixing sea salt with water?

I am looking for ways to easily prepare artificial sea water. The chemical composition doesn't have to exactly match that of natural sea water. On-line I can find recipes to prepare sea water. But I ...
1k views

What is hard and soft water and how does the process of dissolution work?

This is a very basic question about solubility, especially solution of table salt in water and solution of sugar in water. I have heard about terms like hard water, soft water, filtering of water to ...
613 views

Why does the potential difference of a current drop, when silver nitrate is added to deionised water?

Semi-related to Why do some salt ions in solution conduct electricity better than others? After conducting more experiments, using deionised water as an analyte only, I found the potential difference ...
5k views

Are all solutions of weak acid/bases buffers?

I am having a difficult time understanding what makes a buffer a buffer. Buffers in my textbook are defined as a solution of a weak acid or base and their conjugate acid/base. So if I were to just ...
9k views

Are Na and Cl ions from NaCl in water separate charged particles?

Suppose I pour some sodium chlorine into water. So, what happens is that $$\ce{NaCl (s) -> Na+ (aq) + Cl- (aq)}$$ meaning that the ionic bond between Na and Cl breaks up (correct this far?) ...
1k views

How to make 0.3% ammonia water from 28-30% ammonia hydroxide

Can someone tell me how to make 0.3% ammonia water from 28-30% Ammonia hydroxide? I am trying to make a gallon or 3.78 Liters.
2k views

Solubility of gold salt solution?

I was wondering what salts of gold are soluble and which are insoluble. From what I understand, silver is soluble as silver nitrate but insoluble as most other common salts like chlorides and ...
2k views

Effect of a solute on the boiling point of the solution

I have a question regarding the boiling point. If we have two different aqueous solutions, let's say one with glucose and the other with ethanol; and, Both solutions have same molarity 1M. Do they ...
180 views

How do I make a dysprosium chloride solution from dysprosium oxide?

I know that dysprosium oxide is insoluble in water. I was told that I need to add concentrated $\ce{HCl}$ to the compound and then evaporate the $\ce{HCl}$ off. From looking at the reaction equation, ...
59 views

Preparing CdSe electrodeposition bath

What is the best way of preparing an aqueous solution containing 5 mM $\ce{CdSO4}$, 1 mM $\ce{SeO2}$, 0.5 M $\ce{Na2SO4}$ and adjusting pH to 3 by adding 0.5 M $\ce{H2SO4}$? What is the ...
23k views

What are the effects of adding water to a system at equilibrium?

Given the reaction $\ce{NaCl~(s) <=> Na+~(aq) + Cl^{-}~(aq)}$. $\ce{NaCl}$ is added to water and equilibrium is reached. Does the reaction shift to the left/right/not shift at all if more ...
70k views

What is the white substance left behind after boiling down water

I was boiling down water in a stainless steel pot as an experiment the other day. When the water was completely vaporised, a white substance was left behind on the bottom of the pot. I tried rubbing ...
90 views

Dissociation of different compounds?

What would be the dissociation of Hydrosulfuric acid in the presence of water? I was thinking that Hydrosulfuric acid or $\ce{H2S}_{(aq)}$ would form $\ce{2 H+}$ and Sulfur ions. With this logic, I ...
11k views

Why can't alcohols turn blue litmus red?

I came across the fact that alcohols cannot turn blue litmus red. The fact confuses me as they are acidic and acids do turn blue litmus solution red. What prevents alcohols from turning blue litmus ...
3k views

How to interpret the instruction of the dilution of hydrogen peroxide?

I am required to prepare $\pu{120cm3}$ of hydrogen peroxide to each of one of my students tomorrow. Some material is given to me on the method of preparing the solutions. Within the method of ...
6k views

I have 100 mg of a proteinase K lyophilized powder and I need to make it to a working concentration of 25 mg/mL

So I know that I need to add $4~\mathrm{mL}$ of solution to this powder, which will give me a concentration of the enzyme at $25\ \mathrm{mg/mL}$. What I do not understand is how to decide how much of ...
2k views

Prepare 1 liter of 28% NH3(aq) solution from 1 gal of %10 NH3(aq)

I have one gallon of commercial, surfactant free, ammonium hydroxide solution that I would like to use to prepare a concentrated solution. I have two options as I see it, and I am still getting into ...
10k views

Can there be more solvent in a solute?

Something I know that leads to this question: Water dissolved in ethanol. It might sounds weird to say water as a solute. Textbooks always says that solvent is the one present in larger quantity. ...
986 views

Should the volume of a solute be factored into the volume of a solvent when preparing a substance of a certain molarity?

Upon being asked to prepare a solution of a given molarity from a solution with high concentration I was confused whether or not I should factor in the volume taken from the high concentration ...
16k views

Does the water in hydrates affect final concentration?

Say I have a hydrate, and I am going to dissolve it in water. Does the water in the hydrate affect the final concentration? Here's an example: If I have $\pu{249.69 g}$ of $\ce{CuSO4·5H2O}$, and ...
14k views

Which formula is correct for calculating the heat of dissolution?

I want to calculate the energy change when a solute is dissolved in water. I know that I can achieve this by using the equation $q=mc \Delta T$. My question is does the mass ($m$) change with the ...
16k views

Why do some substances ionize instead of dissolving in water?

My question can also be understood as what make something electrolyte or nonelectrolyte? I think this question stems mainly from my confusion with the definitions of ionizing and dissolving. ...
94 views

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Why is water a poor solvent for organic molecules?

Few organic molecules dissolve in water but why is this the case?
13k views

Why is water “the universal” solvent?

This is an old question that our textbook tried to answer but worsened the situation. Many things are soluble in water. So many, that studying solutions will always require studying aqueous ones. It ...
94 views

What other factors can make a compound dissolve into water?

I am doing some homework just right now, and I encountered this problem. I know that the polarity of the water molecules allows them to be a solvent for a variety of polar species or even species ...
22k views

How to calculate the heat of dissolution from a calorimeter experiment?

A $\pu{1.50 g}$ sample of $\ce{KCl}$ is added to $\pu{35.0 g}$ $\ce{H2O}$ in a styrofoam cup and stirred until dissolved. The temperature of the solution drops from $24.8$ to $\pu{22.4 ^\circ C}$. ...
I just discovered that some solid chemicals, such as $\ce{Na2SO4}$, dissolve better in cold water than hot water from here and would like to know if there is any particular reason as to why. Is it ...
As my understanding, there should be an oxidation-reduction reaction: $$\ce{2 Fe^3+ + Cu → 2Fe^2+ + Cu^2+}$$ However, I always see the process using $\ce{FeCl3}$ to etch copper, but I never ...