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solong [7]
2 years ago
5

What is the difference between a mixture, a solution, and a pure substance?

Chemistry
2 answers:
konstantin123 [22]2 years ago
5 0
A mixture is a material made up of two or more different Chemical substance/substances which are not chemically combined, a solution is a homogenous mixture of two or more substances in relative amounts that can be varied continuously up to what is called the limit of solubility, and a pure substance is a substance that has a fixed chemical composition
vichka [17]2 years ago
4 0
A mixture is a compound of two or more substances a pure substance is only made of one kind of atom and a solution is composed of a liquid substance made of two or more types of atoms
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gogolik [260]
By using the ICE table :

initial    0.2 M            0           0
change -X                 + X           +X
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when Ka = (X) (X) / (0.2-X)
so by substitution:

4.9x10^-10 = X^2 / (0.2-X) by solving this equation for X 
∴X ≈ 10^-6
∴[HCN] = 10^-6

and PH = -㏒[H+]
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