Cu + 2AgNO3 + Cu (NO3) 2 + 2Ag

How many grams of Cu react with 105.2 g of Ag?

Mass of Cu react = 31.14 g

Explanation:

Given dа ta:

Mass of Cu react = ?

Mass of silver produced = 105.2 g

Solution:

Chemical equation:

Cu + 2AgNO₃ → 2Ag + Cu (NO₃) ₂

Number of moles of Ag:

Number of moles = mass / molar mass

Number of moles = 105.2 g/107.87 g/mol

Number of moles = 0.98 mol

Now we will compare the moles of Cu and silver from balance chemical equation:

Ag : Cu

2 : 1

0.98 : 1/2*0.98 = 0.49 mol

Mass of Cu:

Mass = number of moles * molar mass

Mass = 0.49 mol * 63.546 g/mol

Mass = 31.14 g