Standardization of Naoh and Hcl

Topics: Potassium hydrogen phthalate, Sodium hydroxide, PH Pages: 2 (270 words) Published: August 30, 2012
Formula: for NaoH
N NaoH = grm KHP / ml NaoH x KHp /1000ml

Formula: for HCL
(NV) HCL = (NV) NaoH or
N HCL V HCL = N NaOH V NaoH
N HCL = VNAOH (NNaoH) / VHCL

(for more info page 62-63 of the photocopy)
KHP = Potassium hydrogen phthalate
= KHC8H4O4
= Mw - 204.23

Trial 1:
NNaoH = 1grm / 20.6 x 204.23 /1000
= 1grm / 4.21
= 0.24 normal
NHCL = 20.6 (0.24) / 39.5
= 4.94 / 39.5
= 0.125 or 0.13

Trial 2:
NNaoH = 1grm / 20.8 x 204.23 /1000
= 1grm / 4.247 or 4.25
= 0.235 or 0.24
NHCL = 20.8 (0.24) / 35.2
=4.99 or 5 / 35.2
= 0.14

AVERAGE:
NNaoH = 1gram / 20.7 x 204.23 / 1000
= 1 grm / 4.23
= 0.236 or 0.24
NHCL = 20.7 (0.24) / 37.35
= 4.968 or 4.97 or 5 / 37.35
= 0.13

STANDARDIZATION OF HCL and NaOH| |
| | I| II | AVERAGE |
Weight of bottle + KHP| 113.6105 grams | 113.6105 grams | 113.6105 grams | Weight of Bottle (empty)| 112.6105 grams| 112.6105 grams| 112.6105 grams| Weight of KHP | 1 grm | 1 grm | 1 grm |

| | | | |
Final Volume of NaOH| 20.6| 20.8| 20.7|
Initial Volume of NaOH| 0| 0| 0|
Volume of NaOh Used | 20.6| 20.8| 20.7|
| | | | |
Final Volume of HCL| 39.5| 35.2| 37.35|
Initial Volume of HCL| 0| 0| 0|
Volume of HCl Used | 39.5| 35.2| 37.35|
| | | | |
N of NaOH| 0.24| 0.24| 0.24|
N of HCL | 0.13| 0.14| 0.13|
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