10 g of caustic soda dissolved in 100 mL 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 ____.
100 g.
Maintain the same ratio (grams : mL): \(10:100= x:1000\Rightarrow x=10\times\dfrac{1000}{100}=100\) g.