# 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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### How is Henry's constant affected by change in temperature

According to me Henry's constant $K_h$ should be directly proportional to the effect of temperature. It is because $K_h$ is inversely proportional to solubility and as we increase temperature ...
1 vote
62 views

### Problem in finding relation between molarity and weight by weight percentage

While finding the relation I did the following steps:- $\frac WW$% $= \frac{W_{solute}}{W_{solution}}\times100$ $.......(eq^n 1)$ (where both masses are in grams) Since weight of solution can be ...
61 views

### what percent HCl is 0.1M HCl solution? [closed]

If I have 1 liter of 0.1M HCl solution, how can I determine what % HCl this is equivalent to?
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### Why does potential difference between electrode and electrolytic phase depend on concentration of metallic ions but not on area of electrode? [closed]

Why is it so that the potential difference between an electrode phase and an electrolytic phase depend upon the concentration of solution but not on the area of electrode dipped in the solution??
85 views

### White powder-like substance on top of sodium hydroxide solution

i've made sodium hydroxide solution adding 100g of hydroxide to water 100g. i've been adding it slowly and constantly stirring. few days later on top of solution was thick layer of white powder. it ...
1 vote
156 views

### Why don't P graphs contradict Raoult's law graphs?

Our teacher gave us the following question: 1 mole each of liquids A, B are mixed in a piston-type vessel and piston is moved slowly and isothermally. (PA0 = 75 torr and PB0 = 25 Torr) Find: (a) ...
366 views

### Variation of conductance of saturated aqueous solution with temperature

The following question was asked in JEE Mains 2020: Let $C_{\ce{NaCl}}$ and $C_{\ce{BaSO4}}$ be the conductances (in S) measured for saturated aqueous solutions of $\ce{NaCl}$ and $\ce{BaSO4}$, ...
82 views

### How can gelling agents "dissolve" in the liquid phase as a "colloid" mixture?

Gelling agents according to Wikipedia: Some thickening agents are gelling agents (gellants), forming a gel, dissolving in the liquid phase as a colloid mixture... But colloid according to Wikipedia: ...
76 views

### Why do azeotropes behave the way they do?

I read this answer to a similar question whilst it proved to be plenty insightful there was this one point I failed to understand: To get a minimum boiling azeotrope, the deviation from Raoult's Law ...
1k views

### Do pipettes always outclass glass syringes?

I was previously working in a lab preparing lots of samples for gas chromatography that exclusively used glass pipettes and was able to get really high precision between replicates. Now I'm working on ...
75 views

### Is dissolution of NH4Cl in water a physical change or chemical change?

A chemical change involves a reorientation of atoms of the substance, resulting in the formation of new substances. A physical change causes changes in physical properties of the substance, like its ...
82 views

### Fundamental reasons for using vapors for ALD rather than solutions

Atomic layer deposition (ALD) has been developed for many materials, as can be seen from this overview: https://atomiclimits.com/alddatabase/ However, a search for liquid phase ALD gives less results. ...
1k views

### Why does entropy increase on mixing two ideal liquids?

Why does entropy increase when we mix two ideal liquids? In my opinion entropy shouldn't change. Say we have two beakers of equal volume filled with $\ce{H2O(l)}$. I mark them red and blue (the ...
1 vote
1k views

### Henry's law p = kx vs m = kp

What exactly is the difference between the following equations? $$p = kx \qquad\text{and}\qquad m = kp$$ Is the $k$ in both same, because I have seen same $k$ in textbooks for both equations?
156 views

### Is this evidence that solubility of sodium bicarbonate<sodium carbonate?

Someone introduced $\ce{CO2}$ into saturated $\ce{Na2CO3}$ solution, and observed that white precipitate is produced. He therefore claims that $\ce{NaHCO3}$ has less solubility than $\ce{Na2CO3}$. His ...
94 views

### Relation between dilution and osmotic pressure

The following question is taken from IAT 2024, an entrance test for research institutes in India at the high school level: Which one of the following plots correctly describes the variation of ...
1 vote
2k views

### How can semi-permeable membrane be so smart?

According to the definition, a semi-permeable membrane is a membrane that allows only solvent molecules to pass through it; solute molecules are blocked. Solvent molecules flow from the membrane side ...
39 views

### Would it be possible to form dense metal using a sol gel technique?

I was trying reduce some silver salt AgNO3 into elemental metal by thermal reduction I mixed it with citric acid and formed a solution and poured it into a circular cap (makeshift mould) and what I ...
48 views

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### In an unsaturated solution, is the product of ions still equal to Ksp?

Suppose I have a solution of a sparingly soluble compound, and consider its solubility in g/L. If I have less g/L of solution than that amount, it means the solution is unsaturated, but what happens ...
71 views

### Can you clearly explain what osmotic pressure is?

There are two main questions I'm struggling to get my head around. What exerts osmotic pressure? Is it the molecules of the solvent (water) or solute particles (sugar) ? Where is it exerted? On the ...
24 views

### Why can we calculate the molar mass of a non volatile solute using lowering in vapour pressure?

Apparently it is possible to calculate the molecular mass of a non volatile solute using relative lowering of vapour pressure using the equation: Where P is the total vapour pressure of the solution, ...
1 vote
76 views

### What does it mean for a substance to be "sparingly soluble"?

I have trouble understanding what solubility means. Merriam-Webster defines it as follows: 1 the quality or state of being soluble 2 the amount of a substance that will dissolve in a given amount of ...
62 views

### Calculate the volume (in mL) of 0.200 M CaCl₂

Trying to calculate the volume (in mL) of 0.200 M CaCl₂ needed to produce 2.00 g of CaCO₃ (s). There is an excess of Na₂CO₃. Molar Mass of Carbon Carbonate = 100.09 g/mol. I am getting the answer ...
1 vote
43 views

### Increasing energy density for flow batteries with water based electrolyte?

Given a flow battery with a water based electrolyte, would it be possible to increase the energy density of battery by precipitating the redox active species from the anolyte and catholyte solutions? ...
1 vote
51 views

### History of Azeotrope (azeotropic mixtures)

I'm currently researching the history of azeotropic mixtures for an essay, and I've come across some interesting information. The term "azeotrope" was coined in 1911 by English chemists John ...
31k views

### Does solute add to volume of solution?

I have to calculate the concentration of sucrose in water just by knowing their masses (and their temperature). Now, if the volume doesn't change when the sugar is being dissolved, I can do that quite ...
When one chemical is added to another how would we come to know whether the compound dissolves in it or reacts with it? For example $\ce{AgNO3}$ dissolves in $\ce{CCl4}$ whereas it could also have ...