Percent of Salt by Weight

1. Sep 10, 2007

punky92

High School Geometry

1. The problem statement, all variables and given/known data

When the concentration of salt in a lake is greater than three percent by weight, the lake is a salt lake.

Find the percent of salt by weight for each of the water levels of Mono Lake Shown in the table. One liter of water weighs 1kg or 1000 grams.

Water level (Feet above sea level) 6417
Salt Content (grams per liter) 51.3

2. Relevant equations

Unknown

3. The attempt at a solution

6417+51.3 = 6468.3
51.3/6468.3 = 0.0079309
0.0079309 * 100 = 79%
Thanks

Last edited: Sep 10, 2007
2. Sep 10, 2007

punky92

1. The problem statement, all variables and given/known data

When the concentration of salt in a lake is greater than three percent by weight, the lake is a salt lake.

Find the percent of salt by weight for each of the water levels of Mono Lake Shown in the table. One liter of water weighs 1kg or 1000 grams.

Water level (Feet above sea level) 6417
Salt Content (grams per liter) 51.3

2. Relevant equations

3. The attempt at a solution

6417+51.3 = 6468.3
51.3/6468.3 = 0.0079309
0.0079309 * 100 = 79%
Thanks

3. Sep 10, 2007

Kurdt

Staff Emeritus
This is relatively simple. If there are 51.3 grams per litre of water, then how will you work out the percentage? What is the mass of 1 litre of water?

4. Sep 10, 2007

Staff: Mentor

One should show units in the equations.

Why 6417+51.3 = 6468.3. 6417 feet + 51.3 g/l makes no sense.

The elevation would affect pressure at the surface of the water, but is that relevant?

Mono Lake - http://en.wikipedia.org/wiki/Mono_Lake
Average depth: 17 m (57 ft)
Max depth: 48 m (159 ft)

If one simply take 1 liter and assumes little change in volume with the 51.3 g of salt then,

1 liter has 1000 g of water and 51.3 g of salt, so . . . .

What is the volume of the salt?

5. Sep 10, 2007

Kurdt

Staff Emeritus