# Mass Balance Problem

Please see the attached file for full problem description.

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Q1. Starting with a pulp with a water content of 99%, how much water must be removed to obtain one ton of paper containing 60% water?

Solution.

Water removed

Pulp 1-ton paper

99 % H20 60% H20

Basis: 100 ton of paper

Let x represent the pulp used to produce paper

Let y represent the paper created by the pulp.

Let w represent the water removed by the evaporator.

X = W +Y

(99/100) X = W(0) + 1(60/100)

X = 0.60

Substitute into equation to calculate the amount of water removed.

0.60 = W + 1

0.40 = W

https://brainmass.com/chemistry/stoichiometry/mass-balance-problem-14567

#### Solution Preview

Please see the attached file.

Q1. Starting with a pulp with a water content of 99%, how much water must be removed to obtain one ton of paper containing 60% water?

Solution.

Water removed

Pulp 1-ton paper

99 % H20 ...

#### Solution Summary

The expert determines how much water must be removed to obtain one ton of paper containing 60% water.