Question

How many grams of zinc chloride will be produced from 55. grams of zinc assuming hydrochloric acid is available in excess

Answer 1

Mass = 114.5 g

Step-by-step explanation:

Given data:

Mass of zinc = 55 g

Mass of ZnCl₂ produced = ?

Solution:

Chemical equation:

Zn + 2HCl → ZnCl₂ + H₂

Number of moles of Zn:

Number of moles = mass/molar mass

Molar mass of Zn = 65.4 g/mol

Number of moles = 55 g/ 65.4 g/mol

Number of moles = 0.84 mol

Now we will compare the moles of Zn and zinc chloride,

Zn : ZnCl₂

1 : 1

0.84 : 0.84

Mass of ZnCl₂:

Mass = number of moles × molar mass

Molar mass of ZnCl₂= 136.3 g/mol

Mass = 0.84 mol × 136.3 g/mol

Mass = 114.5 g