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Andrei [34K]
3 years ago
13

The following characteristics describe which of these terms? The substance is mixed uniformly throughout and each part of the su

bstance contains the same ratio of materials with the same properties.
A.homogeneous mixture
B. compound
C. heterogeneous mixture
D. pure substance
Chemistry
2 answers:
katrin [286]3 years ago
8 0
Hi there! I had the same question on my test as well!
The correct answer is (A) Homogeneous mixture!
I hope I helped you, and I am 100% this is the right answer!
prohojiy [21]3 years ago
6 0

Answer: The correct answer is (A).

Explanation:

Homogeneous Mixtures are the mixture in which:

  • Substance is uniformly distributed throughout the medium.
  • Each part of the mixture contains same ratio of the substance.
  • Properties of the substance remains unchanged.
  • For example: Sugar in water, alloys of metals etc.

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The copper(I) ion forms a chloride salt (CuCl) that has Ksp = 1.2 x 10-6. Copper(I) also forms a complex ion with Cl-:Cu+ (aq) +
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Answer: (a) The solubility of CuCl in pure water is 1.1 \times 10^{-3} M.

(b) The solubility of CuCl in 0.1 M NaCl is 9.5 \times 10^{-3} M.

Explanation:

(a)  Chemical equation for the given reaction in pure water is as follows.

           CuCl(s) \rightarrow Cu^{+}(aq) + Cl^{-}(aq)

Initial:                         0            0

Change:                    +x           +x

Equilibm:                   x             x

K_{sp} = 1.2 \times 10^{-6}

And, equilibrium expression is as follows.

          K_{sp} = [Cu^{+}][Cl^{-}]

       1.2 \times 10^{-6} = x \times x

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Hence, the solubility of CuCl in pure water is 1.1 \times 10^{-3} M.

(b)  When NaCl is 0.1 M,

       CuCl(s) \rightarrow Cu^{+}(aq) + Cl^{-}(aq),  K_{sp} = 1.2 \times 10^{-6}

   Cu^{+}(aq) + 2Cl^{-}(aq) \rightleftharpoons CuCl_{2}(aq),  K = 8.7 \times 10^{4}

Net equation: CuCl(s) + Cl^{-}(aq) \rightarrow CuCl_{2}(aq)

               K' = K_{sp} \times K

                          = 0.1044

So for, CuCl(s) + Cl^{-}(aq) \rightarrow CuCl_{2}(aq)

Initial:                     0.1                 0

Change:                -x                   +x

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Now, the equilibrium expression is as follows.

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         0.1044 = \frac{x}{0.1 - x}

              x = 9.5 \times 10^{-3} M

Therefore, the solubility of CuCl in 0.1 M NaCl is 9.5 \times 10^{-3} M.

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