Science

Units of Measure

Chemistry

# When salt is added to water does the total mass of the solution equal the mass of salt plus the mass of water?

###### Wiki User

###### 2007-06-24 09:03:32

Yes, always for all mixtures.

Interestingly, the volume of the solution may not equal the volume

of the two things before being mixed -- even for mixing two

liquids.

## Related Questions

###### Asked in Percentages, Fractions, and Decimal Values

### How can i make a 10 percent glucose solution from 50 percent glucose solution?

Let's say the total solution is 100 liters. 50 of the liters is
glucose and 50 is water. We want to make the 50 glucose equal to
10% of the total solution. For that to happen, we need to make the
total solution 500 liters (50 of the 500 would be a 10% solution).
So we add 400 liters of water to the original 100 liter (50/50)
solution.
Take the total number of units and multiply by 4. Add that much
in water.

###### Asked in Math and Arithmetic, Algebra

### How many ounces of pure water must be added to 50 ounces at a 15 percent saline solution to make a saline solution that is 10 percent salt?

Add 25 oz of pure water
Let X be the volume of pure water to add. Then the total amount
of pure water you add plus the total amount of water in the 15%
solution will equal the total amount of water in the final 10%
solution.
So,
X + 50*(1-0.15) = (50 + X) * (1-0.10)
X + 50*(0.85) = (50 + X)*(0.90)
X + 42.5 = 45 + 0.90X
1X - 0.90X = 45 - 42.5
0.10X = 2.5
X = 25