Question

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+ ions in the water sample in ppm CaCO3?

Answer 1

concentration is given by moles per mL, meaning: \(\sf \color{red}{\frac{mol}{mL}}\)

Answer 2

moles per liter, sorry. Convert your volume to Liters.