Question

TUIL. MP contains no phosphorous. Ils formula is given in the laboratory directions along with KHP Titrations Mass of KHP 1.0421g 1.1936g Moles of KHP Initial Volume V. 21.19 ml 1.00 ml Final Volume VI 41.12 ml 23.18 ml Volume required (Vr-V.) 19.93 ml 22.18 ml Molarity of NaOH Average Molarity of NaOH (from your group's data only)

Answer 1

Question :- Answer :- vok+ TO ) (KHP) (Potassium hydrogen Phitha kate) ( molam mass = 209.22 g/mol) for, Section 1 Mass of KHP = 1.0421 Moles of KAP = 1.0421 904.22 -- = 0.0051 mol Moles of NaOH = moles of KHP -0.0051 mol volume of NagH for required titration = 19.93 mL 0.0051 mol x 1000 mL 19.93 m2 IL Molarity of NaOH = - Molartly - mol = 0.255 mol/ = 0.255 M is 0.255 M 30, Molarity of Naon for section-2 , Mass of KHP = 1.1936 g 1.1936 204.22 -0.0058 mol Moles of KAP = = 0.0058 mot Moles of NaoH = 22.18 ml for thration volume of NaOH required

Molority of NanH = 0.0058 mod x 1000 ml 82.18 m > 01251 molle = 0,261 M ... Molarity of NagH = 0.261 , .: Average mobreity of Nach = 0.255 +0.241 = 0.258 M
Molarity is equal to mol/L. For 1 mol KHP titration need 1 mol NaOH.Thus we can calculate the molarity of NaOH.