At a certain temperature, the ph of a neutral solution is 7.43. what is the value of kw at that temperature? express your answer numerically using two significant figures.

The formula for Kw is:

Kw = [H]*[OH]

where [H] and [OH] are concentrations

We are given the pH so we can calculate the [H] concentration from the formula:

pH=-log[H]

7.43 = - log[H]

[H] = 3.715x10^-8 M

In neutral solution, [H] = [OH], therefore:

[OH] = 3.715x10^-8 M

Calculating Kw:

Kw = (3.715x10^-8) * (3.715x10^-8)

Kw = 1.38 x 10^-15