Question

In: Chemistry

A. Approximate Molarity of Calcium Ions (Ca2+ (aq)) in Tap Water is 2.99 x 10^-3 M....

A. Approximate Molarity of Calcium Ions (Ca²⁺ (aq)) in Tap Water is 2.99 x 10^-3 M.

1- How many moles of Calcium Ions are present in 25 mL?

2- How many grams of calcium ions are present in 25 mL?

B. Approximate ppm of Calcium Ions (Ca²⁺ (aq)) in Tap Water is 120 ppm.

1- How many grams of Calcium Ions are present In 1,000,000 mL based on the concentration determined in ppm?

2- How many grams of Calcium Ions are present In 25-mL based on the concentration determined in ppm?

Expert Solution

A)

1 ) 74.75 * 10^—6 moles of calcium ions are present in 25 mL solution .

2) 2.99*10^—3 grams of calcium ions are present in 25 mL solution .

The detail calculations are shown below .

B)

1) 120 grams of calcium ions are present in 1000000 mL of water solution .

2) 0.003 grams of calcium ions are present in 25 mL of water solution .

The detail calculations are shown below .

queen_honey_blossom answered 2 years ago

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