You have been given sodium sulfate and sodium sulfite tubes. Determine with the help of one reagent
September 23, 2021 | education
| You have been given sodium sulfate and sodium sulfite tubes. Determine with the help of one reagent in which tube each of the indicated substances is located.
Sodium sulfite is a salt of a weak acid and a strong base, therefore, it will hydrolyze in an aqueous medium:
Na2SO3 + H2O = NaOH + NaHSO3
Due to the hydrolysis process, the sodium sulfite solution will be alkaline, so it can be distinguished by adding litmus (the indicator will turn blue).
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