Question

how many moles of sodium sulfate will be produced from 25.5 g

 of sodium hydroxide?

Answer 1

We know that we get sodium sulphate from sodium hydroxide when sodium hydroxide reacts with sulphuric acid reaction can be shown as follows

$2NaOH+ H_2SO_4 \longrightarrow Na_2SO_4 + 2H_2O$

From above reaction we can find that 2 mole of sodium hydroxide will give 1 mole of sodium sulphate

mass of sodium hydroxide given = 25.5

mole of sodium hydroxide = $\frac{mass}{molar mass}= \frac{25.5}{40}=0.6375$

mole of Na₂SO₄ produce = $0.5 \times 0.6375 = 0.31875$ mole

mass of sodium sulphate produce = $mole \times molar mass= 0.31875 \times 142= 45.26$

mass of sodium sulphate produce = 45.26 g