Question

Which of the following statements is correct about an aqueous solution of an acid and a base? i) Higher the pH stronger the acid ii) Higher the pH weaker the acid iii) Lower the pH stronger the base iv) Lower the pH, weaker the base 2. Name the compound which contains

Answer 1

Answer:

Higher the PH weaker the acid.

Option B.

ReAsOn❤️ :

In Ph scale, 7 is the mid point

#Below the PH value 7,the Acids are strong.

#Above the PH value 7,the bases are strong.

Additional information ❤️

Concentration of H+ions is measured in PH scale.

H+ =acid

OH- =bases

Hope u understand

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Answer 2

Answer :

ii ) Higher the pH , weaker the acid

iv) Lower the pH , weaker the base

Explanation :

When an acid and a base react together , neutralisation reaction takes place to form a salt and water .

Acid + Base $\longrightarrow$ Salt + Water

The pH of the salt defines its acidic or basic character :

• If pH < 7 , the salt is acidic
• If pH = 7 , the salt is neutral
• If pH > 7 , the salt is basic

1. The acidic character decrease with rising pH and basic character increase .
2. The acidic character increase with falling pH and basic character decrease .

Nature of salt is determined by the dominant nature of reactant ; for example:

Strong acid + Weak base $\rightarrow$ Acidic salt

Weak acid + Strong base $\rightarrow$ Basic salt

Strong acid + Strong base $\rightarrow$ Neutral salt

Weak acid + weak base $\rightarrow$ Neutral salt