Calculate Concentration of Salt in Solution in Parts Per Thousand (ppt)

What is the concentration of salt in the solution in parts per thousand (ppt) when 12 grams of salt are dissolved in 2 liters of solution?

a) 600 ppt b) 120 ppt c) 240 ppt d) 480 ppt

Final Answer:

The correct concentration of salt in the solution is 6 parts per thousand (ppt), which is found by dividing 12 grams of salt by 2 kilograms of solution and multiplying by 1000.

When it comes to calculating the concentration of a solute in a solution, it is important to consider the amount of solute relative to the volume of the solution. In this case, we are given 12 grams of salt dissolved in 2 liters of solution. To determine the concentration in parts per thousand (ppt), we need to use the formula:

Concentration (ppt) = (mass of solute in grams / volume of solution in kilograms) × 1000

Since the density of water is close to 1 g/mL, we can approximate 2 liters of solution to weigh around 2000 grams, which is equivalent to 2 kilograms. Plugging in the values, we get:

Concentration (ppt) = (12 g / 2 kg) × 1000 = 6 ppt

Therefore, the correct concentration of salt in the solution is 6 parts per thousand (ppt). It is essential to understand the concept of parts per thousand and how to calculate it accurately for various solutions.