Question

In the following equation, how many grams of Pb(NO3)2 will be produced if you react 25 grams of HNO3? PbO + 2H(NO3) -> Pb(NO3)2 + H2OHELPFUL INFO: molar mass of PbO=223.2 g/mol, molar mass of H(NO3) =63.01g/mol, molar mass of Pb(NO3)2 =331.2g/mol, molar mass of H2O=18.0g/molShow all your work, step by step.

Answer 1

First, we write our reaction:

PbO + 2HNO3 ====> Pb(NO3)2 + H2O (it is already balanced)

We need the mass of Pb(NO3)2 to be produced, from 25 g of HNO3

Procedure: Stoichiometry

Data:

The molar mass of PbO=223.2 g/mol

The molar mass of HNO3 =63.01g/mol

The molar mass of Pb(NO3)2 =331.2g/mol

The molar mass of H2O=18.0g/mol

According to our reaction, we proceed like this:

2 x 63.01 g HNO3 ------- 1 x 331.2 g Pb(NO3)2

25 g HNO3 -------- X

X = (25 g x 1 x 331.2 g)/ 2 x 63.01 g

X = 65.70 g

Answer: 65.70 g Pb(NO3)2