Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker. the solution still looked clear like water, but when the students carefully touched the beaker one at a time, it felt warm to the touch. why did the beaker most likely feel warm?

Explanation- Heat is one sign that a chemical reaction is occurring. A chemical reaction produces new substances that are different from the original substances.

Hydrochloric acid is a strong acid which reacts with the strong base sodium hydroxide to produce salt, water, and heat.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%