Question

5. What will be the water Content if 9.78g of water was added in 100g dry soil sample ? (a) 8.90%(b) 9.78% (c) 7.98% (d)8.78%
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Answer 1

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Answer 2

Concept:

• Percentages
• Dry weight

Given:

• Amount of water added w = 9.78 g
• Amount of dry soil sample s = 100 g

Find:

• The percentage of water content in the soil sample

Solution:

We first need to find the total mass of the water and the soil sample

total mass m = w + s

m = 9.78 + 100 = 109.78 g

The percentage of water content = (mass of water/ total mass) * 100%

The percentage of water content = w/m * 100%

The percentage of water content = 9.78/ 109.78 * 100%

The percentage of water content = 0.089 * 100%

The percentage of water content = 8.90 %

The water content will be 8.90 %. The correct option is a).

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