Calculate the Change in Water Salinity in a Saltwater Aquarium

What was the amount the student changed the water's salinity by?

a) 0.86 ppt

b) 5 ppt

c) 69 ppt

d) 1,443 ppt

Answer:

The student changed the water's salinity by 5 ppt.

Water salinity is an important factor to consider in maintaining a saltwater aquarium. The ideal salinity for a saltwater aquarium is typically around 32 parts per thousand (ppt). In the scenario provided, the student noticed that the fish in his aquarium were getting sick, and upon checking the water's salinity, it was found to be at 37 ppt, which is too high.

To correct the situation, the student needed to adjust the water's salinity to the ideal value of 32 ppt. Utilizing the formula for calculating the change in water salinity, which is:

Change of water salinity = High water salinity - Adjusted salinity

By plugging in the values from the scenario, we get:

Change of water salinity = 37 ppt - 32 ppt = 5 ppt

Therefore, the student changed the water's salinity by 5 ppt to bring it down to the optimal level. By taking this action, the student was able to create a healthier environment for the fish in the saltwater aquarium, promoting their well-being and overall health.