Question

If a sample of a certain solution is determined to have a [H3O+] concentration of 9.49×10−1 moles/liter, what is its pH? Round off your answer to one decimal place.

Answer 1

The answer is 0.0 according to Hawkes Learning. I did this problem and got it wrong at first but they said the correct answer is 0.0.

Step-by-step explanation:

Before attempting to answer this question, it may be helpful to review the properties of logarithms and the definition of pH.

This question can be answered in the following manner.

pH=−log([H3O+])

=−log(9.49×10−1)

=−log(9.49)−log(10−1) loga(xy)=loga(x)+loga(y)

=−log(9.49)+1 log(10x)=x

≈0.0 round off to one decimal place

Answer 2

Answer: The pH of the solution is 1.022

Step-by-step explanation:

pH is defined as the negative logarithm of hydrogen ion concentration present in a solution.

To calculate the pH of the reaction, we use the equation:

`pH=-\log[H^+]`

where,

`[H^+]=9.49* 10^(-1)mol/L`

Putting values in above equation, we get:

`pH=-\log(9.49* 10^(-1))\\\\pH=1.022`

Hence, the pH of the solution is 1.022