# Problem: The mass percentage of chloride ion in a 26.00 mL sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.52 mL of 0.2996 M silver nitrate solution to reach the equivalence point in the titration.What is the mass percentage of chloride ion in the seawater if its density is 1.025 g/mL? Express your answer using four significant figures.

###### FREE Expert Solution

Balanced equation is:

Cl-+ AgNO3 AgCl + NO3-

• Mole ratio:
• 1 mole Cl- reacts with 1 mole AgNO3
• At equivalence point:
• moles Cl- = moles AgNO3

= 0.01274 mol Cl-

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###### Problem Details

The mass percentage of chloride ion in a 26.00 mL sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.52 mL of 0.2996 M silver nitrate solution to reach the equivalence point in the titration.

What is the mass percentage of chloride ion in the seawater if its density is 1.025 g/mL? Express your answer using four significant figures.