Question

In the reaction 2NaOH + H2SO4 → Na2SO4 + 2H2O, 80 grams of NaOH reacts with H2SO4 to form _______ grams of Na2SO4. Fill in the blank.

Your answer:

142 g


114 g


33.1 g


250 g

NEED HELP!!!! AND IF YOU KNOW THE ANSWER CAN YOU EXPLAIN IT.

Answer 1

Answer:
Option-A, 142 g is the correct answer.

Solution:
Balance Chemical Equation is as follow,

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

According to equation,

79.98 g (2 mole) NaOH react to form = 142 g (1 mole) of Na₂SO₄
So,
80 g NaOH on reaction will produce = X g of Na₂SO₄

Solving for X,
X = (142 g × 80 g) ÷ 79.99 g

X = 142.01 g of Na₂SO₄