Kb from Ka calculator (Easily calculate Kb when Ka value given)

How to use K_b from the K_a calculator?

Note: This calculator uses scientific notation, as most of the numerical for K_a and K_b calculations are given in the scientific form.

⇒ Scientific notation consists coefficient and an exponent. For example – If the scientific notation is 2.5 × 10^-5, then the coefficient is 2.5 and the exponent is -5.

Using the above calculator you can easily calculate the K_b value from K_w and K_a values.

• There are two input fields for entering the K_a value, one for the coefficient and one for the exponent.
• The K_w value is displayed as read-only and cannot be changed, with a coefficient of 1.0 and an exponent(10 to the power) is -14.
• To use the calculator, enter a coefficient and exponent for the K_a value in the corresponding input fields.

Click the “Calculate” button to perform the calculation. The result for the K_b value, including the coefficient and exponent, will be displayed in the “Result” section.

If you want to clear the fields and start a new calculation, click the “Refresh” button to clear the input fields and the result display.

How to calculate K_b from K_a?

K_a and K_b can be interconverted using a chemical entity called the water dissociation constant (K_w).

The relationship between K_b and K_a is –

⇒ K_a. K_b = K_w                        [∴ K_w = 1.0 x 10^-14]

If the value of K_a is known, we can easily determine the value of K_b by making K_b the subject of the formula.

Example of calculating K_b value using “K_b from K_a calculator”

Let’s say we have given the value of K_a and we need to calculate the K_b value.

For example – If K_a = 1.8 x 10^-5, what is the K_b value?

As we know, the formula to find K_b from K_a is –

⇒ K_b = K_w/K_a                       [∴ K_w = 1.0 x 10^-14]

We have, K_a = 1.8 x 10^-5. [Where the Coefficient is 1.8 and the exponent is -5].

So, just put the value of K_a in the respective field in the “K_b from K_a calculator” and then press calculate button.

∴ We have got the answer for the K_b value is 0.556 × 10^-9, this can also be written as 5.6 x 10^-10.