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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Dihydrogenphosphate and hydrogenphosphate buffer solution
I have just come across a problem involving a buffer solution comprising of dihydrogenphosphate ions and hydrogen phosphate ions, which asks how the mixture of these two ions can function as a buffer ...
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What is the exact definition of isotonic solutions?
Background of the Question
I am a high school student so maybe my understanding of this topic is quite less, so apologies in case I have asked an elementary question.
My chemistry sir taught that :-
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Why Henry's Law for solubility of gas is defined in two ways?
My school book (NCERT) states Henry's Law as: The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the surface of liquid or solution.
and then ...
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Why doesn't vapour pressure depend upon the amount of liquid?
I was reading about the Clausius-Clapeyron Equation, which is as follows:
I was also reading about Vapour Pressure, when I learned this:
The vapor pressure of a liquid does not depend on the amount ...
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Solubility or reactivity of tantalum carbide and potassium polyselenides?
It is probably an unexplored system, but is there anything known about the low temperature thermodynamic equilibrium state of this?
By 'tantalum carbide', I mean $\ce{TaC}$, and by potassium ...
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Henry's Law vs Raoult's Law Standard States for Activities
I am currently reading McQuarrie and Simon's Physical Chemistry and don't fully understand their discussion of standard states for activities. On page 990 they write (with a few minor adjustments to ...
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Find the pH of a solution obtained by mixing 100 ml 0.1m Na3PO4 and 100 ml 0.1 M NaH2PO4. Given that H3PO4: [Κα₁ = 10^-4, Κα₂ = 10^-7, Каз = 10^-11] [closed]
So, my query is that since NaH2PO4 is a weak acid, and Na3PO4 is a basic salt, wouldn't they react? Another theory was that since NaH2PO4 is a weak acid and Na3PO4 is a salt of strong acid and NaH2PO4,...
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Why do some powders form powder-filled blobs in a liquid?
e.g., why does this happen? (I think in the picture, it's flour mixed with water. I've seen examples of this with many different powders mixed in liquids, usually water.)
What has happened at the ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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? ...
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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 ...
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