Reagent grade potassium hydrogen phthalate (khp, mass 204.23g/mole) is a high molecular weight, stable, monoprotic solid acid. it is commonly used for standardizing sodium hydroxide solutions. what concentration of sodium hydroxide solution would be needed to titration 0.6000g of khp so that the volume of naoh needed is 35.00ml

KHP (aq) + NaOH(aq) ---> KPNa (aq) + H2O(l)

Moles of KHP =

Moles of NaOH =

Molarity of NaOH =

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%