Question

3.30g of Zinc is dissolved in Hydrochloric acid, producing zinc chloride ZnCl_{2} and hydrogen gas
a)Write a balanced equation using moles
b)How many moles of zinc chloride does the reaction produce?
c)What mass of zinc chloride does the reaction produce

Answer 1

Answer:

a) Zn + 2HCl -------> ZnCl2 + H2

b) 0.05 moles

c) 6.8g

Explanation:

Zn          +           2HCl         -------->       ZnCl2           +            H2

3.30g                                                ; . same ratio

Mr=65g                                            of   1 : 1

moles = mass/molarmass               so, 0.05 moles

moles = 3.30/65                            Mr = 136g

          = 0.05 moles                     mass = moles * Mr

                                                               = 0.05 * 136

                                                               = 6.8g