Question

which of the following solution has PH 7? (a.pure water b.Naoh c.HCL D.lemon juice )

Answer 1

Answer:

Option B)NaoH

Explanation:

Hope it helps you

Answer 2

Pure water has a pH equal to 7. Hence the correct option is (a) Pure water.

Explanation:

• The pH value can be said to be the measure of the concentration of the hydronium ion present in the solution. The pH value is equal to the negative base 10 logarithm of the hydronium ion concentration.

                                            ∴ pH = -log₁₀[H⁺]

• A solution can be acidic, neutral, or alkaline depending upon the value of pH. If the temperature of the solution is around 25°C then:

1. A solution having a pH value less than 7 is acidic in nature. In such solutions, the H⁺ ion concentration is greater than the OH⁻ ion concentration.
2. A solution having a pH value around 7 is neutral in nature. In such solutions, the concentrations of the H⁺ ions and OH⁻ ions are almost equivalent.
3. A solution having a pH value greater than 7 is alkaline in nature. In such solutions, the OH⁻ ion concentration is greater than the H⁺ ion concentration.

(a) Pure Water: Pure water is neutral in nature therefore it has a pH value equal to 7.

(b) NaOH: NaOH is alkaline in nature therefore it has a pH value greater than 7.

(c) HCl: HCl is acidic in nature therefore it has a pH value of less than 7.

(d) Lemon Juice: Lemon Juice is acidic in nature therefore it has a pH value of less than 7.

Therefore Pure water has a pH equal to 7. Hence the correct option is (a) Pure water.

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