#### Fill in the blanks to make the statement 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 ______.

Let x gm  of caustic soda is required.

$\\\Rightarrow 10 \mathrm{~g}: \mathrm{xg}=100 \mathrm{~mL}: 1 \mathrm{~L} \\ \Rightarrow 10 \mathrm{~g}: \times g=100 \mathrm{~mL}: 1000 \mathrm{~mL} \\ \\ \Rightarrow \frac{10}{x}=\frac{100}{1000} \\\\ \Rightarrow x=100 \\$

The amount of caustic soda needed for 1 litre of water to make the same type of solution is 100 gm.