Which of the following is true about acids? . A. Acids give foods a bitter taste. . . B. Aqueous solutions of acids conduct elec
2 answers:
Answer : The correct options is, (B) Aqueous solutions of acids conduct electricity.
Explanation :
Acid : It is a substance that has ability of donating proton or hydrogen ion, .
The properties of an acid are :
- Acids are sour in taste.
- The texture of an acid solution is sticky.
- It changes the color of the litmus paper to red.
- It react with a metal to give compound and hydrogen gas.
- An aqueous solution of an acid conduct electricity.
- The pH value of acid is less than 7.
Base : It is a substance that has ability of donating hydroxide ion, .
The properties of an base are :
- Base are bitter in taste.
- The texture of an base solution is slippery.
- It changes the color of the litmus paper to blue.
- It does not react with a metal.
- An aqueous solution of an base also conduct electricity.
- The pH value of base is greater than 7.
Hence, the correct options is, (B) Aqueous solutions of acids conduct electricity.
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Answer: Option (c) is the correct answer.
Explanation:
When an acid or base is added to a solution then any resistance by the solution in changing the pH of the solution is known as a buffer.
This is because a buffer has the ability to not get affected by the addition of small amounts of an acid or a base. As a result, it helps in maintaining the pH of the solution.
In the give case, when we add the HCl then more number of protons will dissociate. This causes the acetate to react with the protons and leads to the formation of acetic acid.
We know that acetic acid is a weak acid and it dissociates partially or feebly. Therefore, no change in pH will take place.
Thus, we can conclude that equation represents the chemical reaction that accounts for the fact that acid was added but there was no detectable change in pH.