Question

Given:

SiO2 + 4HF → SiF4 + 2H2O

In this chemical reaction, how many grams of HF are needed for 182 grams of SiO2 to react completely? Express your answer to three significant figures.

Answer 1

Answer:

242 gram of HF will be required for complete rex.

Balance chemical equation:

SiO2 + 4HF → SiF4 + 2H2O

Data given

mass of SiO2 = 182g

molar mass of SiO2=60.08

moles of SiO2 = mass/molar mass = 182/60.08 =3.02 moles

From balance chemcial equation

SiO2 : HF

1 : 4

3.02 = 4 × 3.02 = 12

mass of HF= no. of moles × molar mass

mass of HF = 12.08×20 = 242 g