Question

A student took a sodium salt and dissolved it in water. When this aqueous sodium salt solution was tested with universal indicator paper, its pH was found to be 9.
(a) What does pH 9 tell us about the sodium salt solution?
(b) Name one sodium salt which can produce such a solution.

Answer 1

Answer:

a. the solution is basic.

b. NaOH sodium hydroxide.

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Answer 2

Sodium Bicarbonate is the Sodium Salt.

Explanation:

• In chemistry, pH is what is called the Potential of Hydrogen.

It is used to check the acidity or basicity of a water-based solution.

• Acidic Solution = Lower pH
• Basic Solution = Higher pH

Pure Water is the only solution to show a pH of 7 which means it is neither Basic nor Acidic, but at Room Temperature.

So, it can be concluded that the Hydrogen ion concentration, which is a measure to check Acidity and Basicity of a Solution is what we called pH, whose Range is from 0 - 14.

At 25 C, the pH of aqueous solution is less than 7 or Acidic, whereas when it becomes greater than 7, the shows Basicity or alkalinity.

So, The Solution is Basic, with a value of 9.

(b) The Sodium salt produced is Sodium Bicarbonate ($NaHCO_3$)