You are required to mix a sodium chloride solution with water in the ratio of 2 5 starting with 780ml of sodium chloride solution how much water needs to be added?

Answer 1

To mix a sodium chloride solution with water in a ratio of 2:5, you need a total of 7 parts (2 parts sodium chloride solution + 5 parts water). Starting with 780 ml of sodium chloride solution, you can calculate the total volume needed by finding the equivalent of 7 parts: ( \frac{780 \text{ ml}}{2} \times 7 = 2730 \text{ ml} ). To find out how much water to add, subtract the volume of the sodium chloride solution from the total volume: ( 2730 \text{ ml} - 780 \text{ ml} = 1950 \text{ ml} ). Therefore, you need to add 1950 ml of water.