When copper (ii) chloride reacts with sodium nitrate, copper (ii) nitrate and sodium chloride are formed. a) write the balanced equation for the reaction given above: b) if 45 grams of copper (ii) chloride react with 25 grams of sodium nitrate, how much c) what is the limiting reagent for the reaction? d) how many grams of copper(ii) nitrate is formed? e) how much of the excess reagent is left over in this reaction? f) if 11.3 grams of sodium chloride are formed in the reaction, what is the percent yield of this reaction?

The answer to your question is:

Explanation:

a)    CuCl₂   +  2NaNO₃    ⇒     Cu(NO₃)₂   + 2NaCl

b)

45 g CuCl₂

25 g NaNO₃                 Is not complete the question

c) MW CuCl₂ = 64 + 71 = 135 g

   MW NaNO₃ = 23 + 14 + 48 = 85 x 2 = 170 g

theoretical Ratio      170 / 135 = 1.26

experimental ratio   25/ 45 = 0.56

Limiting reactant = NaNO₃

d)                    170 g of NaNO₃  126 g of Cu(NO₃)₂

                    25 g                    x

                  x = (25 x 126)/170

                  x = 18.52 g of Cu(NO₃)₂

e)                170 g of NaNO₃    135 g of CuCl₂

                    25 g of NaNO₃    x

                   x = 19.85 g of CuCl₂

Excess = 45 -  19.85 = 25.15 g of CuCl₂

f) 11.3 g of NaCl

Theoretical

                    170 g of NaNO₃  117 g of NaCl

                      25 g                   x

                     x = (25 x 117) / 170

                     x = 17.2 g of NaCl

yield = 11.3/17.2 x 100

yield = 65.7 %

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.