. Given the following pOH's, calculate the pH for the solution: a) pOH = 4.18 b) pOH = 12.35

4. Given the following pH's, calculate the pOH for the solution:

a) pH = 6.2 b) pH = 9.55

Explanation is in the file

cutt.ly/rzNrBcz

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%

the dependant variable is spilled water

the independent is the heat