Question

For pure water, which of the following condition is valid at all
temperature?
pH =7
pH + pOH = 14

pH = pkw/2
pH - pOH = 7​

Answer 1

Answer:

The above given answer is wrong. Dont rely on it

The correct answer is pH = pKw/2

Explanation:

• pH for pure water = 7 at only 25ºC

• pH + pOH = 14 only at 25ºC

• pH = pKw/2  pfor pure water at all temperature

Mark me as brainliest  

Answer 2

Answer:

For pure water, the valid condition at all temperatures is $pH = pKw_{2}$

Explanation:

• $pH$ is simply a measure of the acidity or basicity of any liquid.
• Its range varies from $0$ to $14$.
• $pH = 7$ means that the liquid is neutral (neither acidic nor basic).
• $pH$ less than $7$ means that the liquid is acidic.
• $pH$ more than $7$ means that the liquid is basic.
• It is basically the measure of the amount of free hydrogen as well as hydroxyl ions in the liquid.
• If a liquid has more free hydrogen ions, it is acidic.
• On the other hand, if a liquid has more free hydroxyl ions, it is basic.
• $pH$ is an extremely significant indicator of water that is changing chemically because it can be affected by chemicals present in water.

We know that

• the $pH$ for pure water is $7$ (at $25$°$C$).
• $pH + pOH = 14$ (at $25$°$C$).
• $pH = pKw_{2}$ for pure water (at all temperatures).

Final Answer:

For pure water, the valid condition at all temperatures is $pH = pKw_{2}$.

#SPJ3