Answer:
10.3
Step-by-step explanation:
The pH of a substance is a number spanning from 0 to 14.
A substance with pH between 0 and 7 is said to be acid, while a substance with pH between 7 and 14 is said to be basic. A substance with pH of 7 is a neutral substance.
The pH of a solution can be calculated using the formula:
![pH=-log[H_3O^+]](https://img.qammunity.org/2021/formulas/chemistry/high-school/ii42rdd0lrihbaohdoeleatdk40jexti8r.png)
where
is the concentration of hydronium ion in the solution
In this problem, we have a concentration of hydronium ion in the solution equal to
![[H_3O^+]=4.7\cdot 10^(-11) mol/L](https://img.qammunity.org/2021/formulas/chemistry/high-school/8wrm1pppyhl8yge8cglkon1t85rl1c8if1.png)
Therefore, we can apply the formula above to calculate the pH of the solution, and we find:
![pH=-log[4.7\cdot 10^(-11)]=10.3](https://img.qammunity.org/2021/formulas/chemistry/high-school/rlrhos0vjyvryxwrtkkmr6tjw4tr7gfqi1.png)
So, the pH of this solution is 10.3.