Question

Na2CO3 и Na2SO3 . В растворе какой соли pH больше и почему? Желательно указать значения pH. У Меня есть значения, но хочется проверить

Answer 1

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Answer 2

pH of Na2CO3 and Na2SO3 Solutions

When comparing the pH of Na2CO3 (sodium carbonate) and Na2SO3 (sodium sulfite) solutions, it is important to consider the nature of these compounds and their behavior in water.

Sodium Carbonate (Na2CO3): Sodium carbonate is a salt that is highly soluble in water. When it dissolves in water, it undergoes hydrolysis, resulting in the formation of sodium hydroxide (NaOH) and carbonic acid (H2CO3). Carbonic acid is a weak acid that can partially dissociate, releasing hydrogen ions (H+) into the solution. The presence of these hydrogen ions contributes to the acidity of the solution, resulting in a higher pH value.

Sodium Sulfite (Na2SO3): Sodium sulfite is also a salt that is soluble in water. However, when it dissolves in water, it undergoes hydrolysis to a lesser extent compared to sodium carbonate. The hydrolysis of sodium sulfite results in the formation of sodium hydroxide (NaOH) and sulfurous acid (H2SO3). Sulfurous acid is a weaker acid compared to carbonic acid, and its dissociation is less significant. As a result, the concentration of hydrogen ions (H+) in the solution is lower, leading to a lower pH value compared to sodium carbonate solution.

Therefore, the pH of a sodium carbonate solution is generally higher than that of a sodium sulfite solution.

Unfortunately, I couldn't find specific pH values for Na2CO3 and Na2SO3 solutions in the search results. However, it is important to note that the pH of a solution can be influenced by various factors, such as concentration, temperature, and the presence of other substances. If you have specific pH values that you would like to verify, I recommend using a reliable laboratory measurement or consulting a trusted source that provides experimental data on the pH of these solutions.

I hope this information helps! Let me know if you have any further questions.