InterviewSolution
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InterviewSolution
| 1. |
State as to why a solution of Na2CO3 is alkaline? |
| Answer» When sodium carbonate dissolves in water it dissociates into two sodium (Na+) ions and a carbonate (CO3–2) ion;-Na2CO3 (s) —-> 2 Na+(aq) + CO3–2(aq)The carbonate ion is able to remove protons (H+) from water to form bicarbonate ions and hydroxide ions. Hence it is the conjugate base of the bicarbonate ion;CO3–2(aq) + H2O(l) ←-> HCO3-(aq) + OH-(aq)The overall increase in OH- ions due to these reactions results in an increase in the pH of the solution, and cause it to become alkaline. | |