Question

Determine the concentration of h 3 o + to the correct number of significant figures in a solution with each ph. describe how these calculations show the relationship between the number of digits to the right of the decimal place in ph and the number of significant figures in concentration. ph = 2.50 ph = 2.51 ph = 2.52

Answer 1

To calculate the concentration of H3O+

1- when PH = 2.5 :

The explanation:

we are going to use this formula:

PH = - ㏒[H3O+]

and we here have PH = 2.5 so, by substitution:

2.5 = -㏒ [H3O+]

∴ [H3O+] = 0.00316 ≈ 0.003

2- when PH = 2.51 :

The explanation:

we are going to use this formula:

PH = - ㏒[H3O+]

when here we have PH = 2.51 so, by substitution:

2.51 = - ㏒[H3O+]

∴[H3O+] = 0.00309 ≈ 0.003

3- when PH = 2.52 :

The explanation:

we are going to use this formula:

PH = - ㏒[H3O+]

when here we have PH =2.52 so, by substitution:

2.52 = -㏒[H3O+]

∴[H3O+] = 0.00301 ≈ 0.003

we can see that when the the number of digits to the right of the decimal place in ph increase, the number of significant figures in concentration decrease.