Question

A student mixes 50g of sugar with 300g of water and 5g of lemon. What is the mass of solution?

Answer 1

Why `355*g`.

Explanation:

Every chemical reaction conserves the component masses; of course such mass may be lost to the experimenter by evolution of gas or thru handling.

Here `355*g` of non-volatile material were used; and necessarily `355*g` of mass remain.

In another experiment a punter used the same quantities of material but used `300*g` carbonated water, i.e. fizzy water. After a few hours, the experimenter noticed a slight DROP in mass. How is this possible?