Is an aqueous solution of sodium sulfite acidic or basic?
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Is an aqueous solution of sodium sulfite acidic or basic? Is there a table showing concentration and pH values?
An aqueous solution of sodium sulfite is alkaline. When sodium sulfite is dissolved in water, it forms sulfite ions (SO3^2-) and hydroxide ions (OH^-), and the hydroxide ions give it an alkaline nature. Regarding the table of concentration and pH values, under normal conditions, the pH value of sodium sulfite aqueous solutions ranges between 8 and 9. However, the specific relationship between concentration and pH value needs to be determined based on the experimental conditions. .
It is basic, as sulfite hydrolyzes to release hydroxide ions. The specific pH value is related to the concentration of the sodium sulfite solution and the degree of hydrolytic dissociation of sulfite ions, and it needs to be calculated using the principles of ionization equilibrium.
An aqueous solution of sodium sulfite is alkaline. This is because the chemical formula of sodium sulfite is Na2SO3; when it dissolves in water, it decomposes to yield sulfite ions (SO32-) and sodium ions (Na+). Sulfite ions react with water molecules in water to form sulfurous acid (H2SO3), which is a weak acid; therefore, an aqueous solution of sodium sulfite is basic in nature. Below is a table showing the pH values corresponding to common concentrations, for reference: Concentration (g/L) pH Value 1 8.12 5 8.93 10 9.21 50 9.79 100 10.07 200 10.