# Questions tagged [solutions]

This tag should be applied to questions dealing with solutions of any kind. A solution is a liquid or solid phase containing more than one substance where, for convenience, one (or more) substance(s) called the solvent is treated differently from the other substances, which are called solutes. If water is the solvent, then the more appropriate 'aqueous-solution' tag should (also) be specified.

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### Azeotropic mixtures and Raoult's Law

So I find this everywhere: "Mixtures showing large deviations from Rault's law form azetropic mixtures at specific compositions" My questions are: (a)Why is it so?Why deviation from Raoult's ...
54 views

### Does the composition of a solution keep changing when being boiled? [closed]

The mole fractions of the components of vapours aren't the same as those of the liquid-liquid solution (unless the solution is azeotropic), this implies a change in the composition of the liquid ...
59 views

### Henry's Law and "Gases in Vapour Phase"

I found the following definition of Henry's Law in my textbook: "The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution." My ...
539 views

### To calculate total vapour pressure of a solution

Question: 1 mole each of A and B were mixed to obtain an ideal solution of which one mole went to the vapour phase at equilibrium. If $P°_\mathrm{A} = \pu{100 torr}$ and $P°_\mathrm{B} = \pu{900 torr}$...
61 views

### Finding the concentration from a dilution

This must be a very basic question but I have gotten confused over it. How would I find the concentration of each component of the reaction for each experiment from this data? I am guessing it can’t ...
70 views

### Confusion in solubility expressions in Henry's Law

While reading about Henry's law and solubility I frequently come across two relations: $C = k_{h}P$ (c = concentration of a dissolved gas) $P = k_{h}x$ (x = solubility/mole_fraction) What is the ...
13 views

### What is an effective coagulant/flocculant for an acidic solution?

The acidic solution is a mixture of dissolved ammonium sulfate and mono-ammonium phosphate (pH about 4.5-4.8) along with an inorganic sludge with a similar consistency to clay I am looking to remove ...
65 views

### DIY lipid nanoparticles

I, and a number of friends, take a bunch of supplements that are polyphenols and often flavin-oids, -ols or -es; also numerous carotenoids. Examples include quercetin, luteolin, fisetin, curcumin, ...
2k views

### Equation to find specific gravity (or density) from a solution of sugar and water

Is there an equation or simple way to calculate the final density of a solution made from x grams of sugar and y liters of water? And would it work in reverse? if we have y liters of water at z ...
315 views

### Is mixture of ammonium hydroxide and ammonium nitrate a buffer solution? [closed]

Is a mixture of $\ce{NH4OH}$ and $\ce{NH4NO3}$ a buffer solution? I have seen some examples with $\ce{NH4OH}$ and $\ce{NH4Cl}$ but never $\ce{NH4NO3}$.
828 views

### How do I prepare citric acid solution (from anhydrous powder) of accurate concentration, given that the solution volume expands when water is added?

I attempted to prepare saturated citric acid solution from anhydrous powder. According to online data, the solubility limit was 59.2 w/w at 20 °C, i.e. 59.2 g citric acid in 100 mL water. To ensure ...
24 views

### Why is the Ag+ concentration in a beaker fixed in the reaction between excess AgCl (s) and KI (aq) from the start? [duplicate]

This arises as a sub-question for the following question: Calculate the concentration of I- in a solution obtained by mixing 0.10 M KI with an excess of AgCl(s). I tried to look at How does addition ...
148 views

### How to know if a reaction forms H3O+ ions or OH- ions? [closed]

How would you know when an acid or base is paired with $\ce{H2O}$ that it will form an $\ce{OH-}$ ion or a $\ce{H3O+}$ ion? I just started the acid and base equilibrium unit, and I'm just confused on ...
100 views

952 views

### Kohlrausch Law and conductivity

Im writing up a lab report at the minute and part of it concerns ions in solution and how they affect conductivity. I've been doing lots of reading and I think ive got the grasp of most of it, but its ...