calculat the amount of hcl using 0.05 sodium corbonate solution
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1
Answer:
6.173
The number of milliequivalents of sodium carbonate =50×0.05=2.5
The number of milliequivalents of HCl =40×0.1=4
Na
2
CO
3
+HCl⟶NaCl+NaHCO
3
NaHCO
3
+HCl⟶NaCl+H
2
CO
3
Thus, the resulting solution will contain 1.0 milliequivalent of NaHCO
3
and 1.5 milliequivalents of H
2
CO
3
.
This is an acidic buffer solution.
pH=pK
a
+log
[H
2
CO
3
]
[NaHCO
3
]
=6.35+log
1.5
1.0
pH=6.35+log
3.0
2.0
=6.35+log2.0−log3.0=6.35+0.30−0.477=6.35−0.177=6.173
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