[* بيبو *]

What is the [H+]ion in a 4.8 × 10-2 M KOH solution?

4.8 × 10-2 M
1.0 × 10-7 M
4.8 × 10-11 M
4.8 × 10-12 M
2.1 × 10-13 M

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Calculate the [OH-] ions in a 1.3 M HCl.

Kw = [H3O+][OH−]= 1.0  10−14

[OH−] = 1.0  10−14/ [H3O+]

[OH−] = 1.0  10−14/ 1.3

[OH−] = 7.7  10−15 M

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1. What is the concentration of H+ in a 2.5 M HCl solution?

A. 0
B. 1.3 M
C. 2.5 M
D. 5.0 M
E. 10 .M

ليه كذا صاروا كل واحد طريقة اجابته غير ؟