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mixas84 [53]
4 years ago
8

The solubility of cadmium cyanide is 1.70 g/100 mL of water at 25°C. Which of the following solutions is unsaturated?

Chemistry
1 answer:
hram777 [196]4 years ago
4 0

Answer:

The answer to your question is: letter B is correct

Explanation:

Calculate the Molarity of each solution an compare it to the solubility

Solubility

MW Cd(CN)2    = 252 g

                                         252 g      ----------------  1 mol

                                           1.7 g   ------------------    x

                                        x = (1.7 x1 ) / 252

                                        x = 0.006 mol

            Molarity = 0.006 / 0.1 = 0.067

a.97.0 g of Cd(CN)2 in 5.00 mL

                                          252 g      ----------------  1 mol

                                             97 g --------------------   x

                                          x = (97 x 1) / 252

                                          x = 0.38

            Molarity = 0.38 / 0.005 =75              Saturated

b. 325.5 g of Cd(CN)2 in 20.5 L

                                          252 g      ----------------  1 mol

                                        325.5 g     ----------------    x

                                        x = (325.5 x 1) / 252

                                        x = 1.29 mol

            Molarity = 1.29 / 20.5 = 0.063          Unsaturated

c. No right answer.

d. 4.25 g of Cd(CN)2 in 250.0 mL

                                            252 g      ----------------  1 mol

                                             4.25 g     ---------------   x

                                           x = (4.25 x 1) / 252

                                           x = 0.017

               Molarity = 0.017 / 0.25 = 0.067       Saturated

e. 5.750 g of Cd(CN)2 in 330.0 mL                

                                             252 g      ----------------  1 mol

                                              5.75 g ------------------    x

                                           x = (5.75 x 1) / 252 = 0.023

              Molarity = 0.023 / 0.33 = 0.07        Saturated

   

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