Question

H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4

How many grams of NaNO2 do you need in order to make 24.14714 g of Na2SO4?
(use 5 sig figs)

*btw the answer 23.459 is wrong

Answer 1

23.458 g

Further explanation

Given

Reaction

H2SO4 + 2NaNO2 → 2HNO2 + Na2SO4

24.14714 g of Na2SO4

Required

mass of NaNO2

Solution

mol Na2SO4 :

= 24.14714 : 142,04 g/mol

= 0.17

From the equation, mol NaNO2 :

= 2/1 x mol Na2SO4

= 2/1 x 0.17

= 0.34

Mass NaNO2 :

= 0.34 x 68,9953 g/mol

= 23.458 g