Asked Mar 7, 2020

A sample of seawater from a tidal estuary was found to contain a concentration of 567 mg of chloride ion per kg of seawater. If the density of the sample was 1.035 g/mL, what is the molarity of the chloride ion?


Expert Answer

Step 1

Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are used to calculate the molarity of solution. The relation between moles, and mass is as given below;

Chemistry homework question answer, step 1, image 1

Step 2


Density = 1.035 g/mL

Mass of sea water = 1 kg = 1000 g

Calculate volume of sea water:

Chemistry homework question answer, step 2, image 1

Step 3

Mass of Chloride ions = 567 mg = 567 x 10-3 g

Molar Mass of Chloride ions = 35.5 g/mol

Calculate molarity:

Chemistry homework question answer, step 3, image 1


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