Question

A mixture of baking soda is prepared in water. The mass of this mixture is 225g. The original mass of baking soda was 50g. What is the original mass of water to which the baking soda was added?
A) 50g
B) 175g
C) 225g
D) 275g

Answer 1

Answer : The correct option is, (B) 175 g

Explanation : Given,

Mass of mixture = 225 g

Mass of baking soda = 50 g

Now we have to calculate the mass of water.

Mass of mixture = Mass of baking soda + Mass of water

Mass of water = Mass of mixture - Mass of baking soda

Now put all the given values in this expression, we get the mass of water.

Mass of water = Mass of mixture - Mass of baking soda

Mass of water = 225 g - 50 g

Mass of water = 175 g

Therefore, the original mass of water added was 175 grams.

Answer 2

All you have to do is subtract

225g - 50g = 175g