Question

Question 46

Fill in the blanks to make the statements true.

10g of caustic soda dissolved in 100ml of water makes a solution of caustic soda. Amount of caustic soda needed for 1 litre of water to make the same type of solution is ___.

Answer 1

Given, 10g of caustic soda dissolved in 100ml water.
The ratio of caustic soda to water should be in proportion
10 g : 100 ml :: x g : 1 litre
$\frac{10g}{100ml}=\frac{xg}{1000ml}[\because 1litre=1000ml]$
$\Rightarrow xg\times 100ml=10g\times 1000ml$ [by cross multiplication]
$x=\frac{10g\times 1000ml}{100ml}x=100g$

Hence, the amount of caustic soda needed for 1 litre of water to make the same type of solution is 100g