Chemical Engineering - Chemical Engineering Basics - Discussion
Discussion Forum : Chemical Engineering Basics - Section 4 (Q.No. 17)
17.
If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?
Discussion:
4 comments Page 1 of 1.
Shiv said:
3 years ago
Electrolysis of brine (NaCl) soln dissociated in sodium plus chloride ions in the anode chamber, n water is hydrolysis when H2 gas and OH ions are produced.
With the oH And Na ion reaction, they form NaOH sol with is alkaline in nature so Ph would be greater than 7.
With the oH And Na ion reaction, they form NaOH sol with is alkaline in nature so Ph would be greater than 7.
Tochukwu said:
6 years ago
This is possible with selected catalyst like platinum (high affinity for chlorine), but under normal conditions: H2 leaves at the cathode and oxygen (oxidation of OH-) at the anode. Thus the ph remains neutral but more concentrated.
Loliiita said:
9 years ago
Consider the electrolysis of aqueous NaCl:
Hydrogen & chloride ions discharge at negative & positive electrodes respectively, leaving behind sodium & hydroxide ions. These then combine to form sodium hydroxide, a strong base, which increases the pH of the solution. This can be tested using a litmus solution which turns blue.
Hydrogen & chloride ions discharge at negative & positive electrodes respectively, leaving behind sodium & hydroxide ions. These then combine to form sodium hydroxide, a strong base, which increases the pH of the solution. This can be tested using a litmus solution which turns blue.
MFQY said:
9 years ago
Please, I want explanation for the solution.
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