Question

What mass of sulphuric acid can be made from 8g of SO3

(SO3+H2O==>H2S04)

09.8g
18.2g

Answer 1

10 g H₂SO₄

General Formulas and Concepts:

Chemistry - Stoichiometry

• Reading a Periodic Table
• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

Given: 8 g SO₃

RxN: SO₃ + H₂O → H₂SO₄

Step 2: Identify Conversions

Molar Mass of S - 32.07 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of SO₃ - 32.07 + 3(16.00) = 80.07 g/mol

Molar mass of H₂SO₄ - 2(1.01) + 32.07 + 4(16.00) = 98.09 g/mol

Step 3: Stoichiometry

`8 \ g \ SO_3((1 \ mol \ SO_3)/(80.07 \ g \ SO_3) )((1 \ mol \ H_2SO_4)/(1 \ mol \ SO_3) )((98.09 \ g \ H_2SO_4)/(1 \ mol \ H_2SO_4) )` = 9.80042 g H₂SO₄

Step 4: Check

We are given 1 sig fig. Follow sig fig rules and round.

9.80042 g H₂SO₄ ≈ 10 g H₂SO₄