Question

After 0.63 g of coCl₂ ⋅ 6H₂O is heated, the residue has a mass of 0.345 g. Calculate the mass of water lost during heating.

Answer 1

The mass of water lost when heating CoCl₂ · 6H₂O is found by subtracting the weight of the anhydrous residue from the initial mass. In this case, 0.285 g of water was lost during heating.

Step-by-step explanation:

To calculate the mass of water lost during heating, subtract the mass of the residue from the initial mass of the hydrate.

Mass of hydrate (CoCl₂ · 6H₂O) = 0.63 g

Mass of residue after heating (anhydrous CoCl₂) = 0.345 g

Mass of water lost = initial mass of hydrate - mass of residue

Mass of water lost = 0.63 g - 0.345 g

Mass of water lost = 0.285 g