Question

Type the correct answer in the box. Express your answer to three significant figures.

This balanced equation shows the reaction of sodium hydroxide and sulfuric acid:
2NaOH + H2SO4 → Na2SO4 + 2H2O.

In a laboratory experiment, a student mixes 355 grams of sulfuric acid with an excess of sodium hydroxide. What is the theoretical mass of sodium sulfate produced? Refer to the periodic table and the polyatomic ion resource.

The theoretical mass of sodium sulfate is ____ grams.

Answer 1

its 514

Step-by-step explanation:

Answer 2

Answer: Theoretical mass of sodium sulphate (
`Na_2SO_4` ) is 514.118 grams.

Step-by-step explanation: For a given reaction,

`2NaOH(aq.)+H_2SO_4(aq.)\rightarrow Na_2SO_4(s)+2H_2O(l)`

As NaOH is used in excess, therefore it is an excess reagent and
`H_2SO_4` is a limiting reagent as the quantity of the product will depend on it.

We are given 355 grams of
`H_2SO_4`.

Molar mass of
`H_2SO_4` = 98.079 g/mol

Molar mass of
`Na_2SO_4` = 142.04 g/mol

1 mole of
`H_2SO_4` is producing 1 mole of
`Na_2SO_4`, so

98.079 g/mol of
`H_2SO_4` will produce 142.04 g/mol of
`Na_2SO_4`

355 grams of
`H_2SO_4` will produce =
`142.04g/mol * (355g)/(98.079g/mol)` of
`Na_2SO_4`

Mass of
`Na_2SO_4` = 514.118 grams