Please answer both questions 1)calculate the volume in mL of 0.487 M NaOH soluti
ID: 485509 • Letter: P
Question
Please answer both questions
1)calculate the volume in mL of 0.487 M NaOH solution required to neutralize 0.356 mol HCl produced by the hydrolysis reaction.
2) 2)a student weighs out 1.556g t-butyl alcohol into a large test tube and measures the freezing point of the pure solvent to be 21.4 C. Next the student weighs out 1.056g of water and adds it to the test tube with the t-butyl alcohol and measures the freezing point of the mixture to be 14.8 C. The Kf is calculated to be 0.17 C kg/mol. What is the molar mass of the unknown in grams? show all your work.
Explanation / Answer
1) applying equivalent concept for neutralisation
Equivalent of acid=Equivalent of base
As both acid and base are monovalent
Moles of acid=moles of base
0.487×V=0.356
V=0.731L
V=731 ml