Question

i need help fonding the concentration of NaOH

Standardization of the NaOH Solution Trail Trail 2 Trail 3 .35339 .3548 g 0.00ML 1.39g | 0.00ML 0.00ML Mass of KHP (g) Initial Volume of burette (mL) Final Volume of burette (mL) Volume of NaOH used mL) Concentration of NaOH (moles/L) 21.4mL 22.0 mL 23.4mL 22.0mL 23.4mL 21.4mL Average Concentration of NaOH (mol/L):

Answer 1

Let us first observe the reaction between KHP and NaOH given below-

KHC8H404 + NaOH = Nak C8H404 + H2O

Hence, 1mol KHP reacts with 1 mole NaOH, so if we determine the number of moles of KHP, the same will be the no of moles of NaOH. Using the volume data, we can then determine the molarity of NaOH in moles per liter.

Molar mass of KHP	204.2 g/mol
Mass of KHP	0.3548 g	0.39 g	0.3533g
Number of moles of KHP	1.7 x 10-3	1.9 x 10-3	1.7 x 10-3
Number of moles of NaOH	1.7 x 10-3	1.9 x 10-3	1.7 x 10-3
Volume of NaOH (in L)	0.022 L	0.0234 L	0.0214 L
Molarity of NaOH (mol/L)	0.077 M	0.081 M	0.079 M

hence, Average concentration of NaOH= (0.077+0.081+0.079)/3 =0.079 mol/L.