Question

A sample of 447.9 mg of hydroxylamine (NH2OH) is dissolved in 55.5 mL of DI H2O. This sample is to be titrated with 0.315 M HClO4 . Fill in the following table for each different point (a, b, c, etc….) during the titration. (Make sure all work is attached for credit). Also graph the titration curve with pH on the y­axis and Vbase on the x­axis.

Point |Vbase (mL)| molbase added| mol acid remain| molbase remain| [OH ­ ]| [H3O + ]| pH|

a            0.00

b           7.50

c           13.75

d           38.90

e            Veq=

f            50

Answer 1

Point	VBase(mL)	Mol base added	Mol acid remain	Mol base remanin	[OH-]	[H3O+]	pH
a	0.00	0.0000	0.0111	0.0000	0.0000	0.0110	1.96
b	7.50	0.0018	0.0092	0.0000	0.0000	0.0092	2.04
c	13.75	0.0034	0.0077	0.0000	0.0000	0.0077	2.12
d	38.90	0.0095	0.0015	0.0000	0.0000	0.0015	2.81
e	Veq=45.08	0.0110	0.0000	0.0000	0.0000	0.0000	4.60
f	50	0.0122	0.0000	0.0012	0.0012	0.0000	11.07

Note: assume a 35mL of HClO₄ because you do not know the volume of acid