The concentration of Ca2+ ion present in a blood sample is found to be 5.1 mEq/L.

Question

The concentration of Ca²⁺ ion present in a blood sample is found to be 5.1 mEq/L.

How many milligrams of Ca²⁺ ion are present in 241.0 mL of the blood?

.....mg

with steps please

Answer 1

The equivalent mass of Ca²⁺ is its atomic mass divided by 2 as the Calcium charge is 2+.

The atomic mass of calcium is about 40.1 g/mole, so its equivalent mass is 40.1/2 = 20.05 g/equiv.

The milliequivalent mass is its equivalent mass expressed in mg, so the milliequivalent mass of Ca²⁺ is 20.05 mg.

The remaining calculation is 5.1 mEq/L x 20.05 mg/mEq / 1000 mL/L x 241.0 mL blood.

The answer is 24.6 mg Ca²⁺.