if an acid has a pH of 1.1 what is the hydrogen ion concentration of the solution expressed in scientific notation to 3 significant figures, for my answer can it be written 1 x 10^-1.1 mol dm3? or can you not use decimals in the to the power of so should i write 1.1 x 10^-1
answer can it be written 1 x 10^-1.1 mol dm^-3
While it could be written as that the quection asks for scientific notation and a decimal power is not scientific notation.
Depending on the version of calculator you need to evaluate 1 x 10^-1.1 mol dm^-3
On my Casio fx-83s
key press = <>
<shift><10x><(-)><1><.><1><=>
0.0794 mol dm^-3
7.94 x 10^-2 mol dm^-3
To calculate the hydrogen ion concentration (H+) from the pH, you can use the equation:
[H+] = 10^(-pH)
Given that the pH of the acid solution is 1.1, you can substitute this value into the equation:
[H+] = 10^(-1.1)
To express this in scientific notation with 3 significant figures, you can round the answer:
[H+] ≈ 7.94 x 10^(-2) mol dm^-3
Therefore, you should write the answer as 7.94 x 10^(-2) mol dm^-3, not 1 x 10^-1.1 mol dm^3 or 1.1 x 10^-1 mol dm^3.
To determine the hydrogen ion concentration of a solution based on its pH, you can use the equation:
[H+] = 10^(-pH)
Given that the pH is 1.1, you can substitute this value into the equation to find the hydrogen ion concentration.
[H+] = 10^(-1.1)
To express the answer in scientific notation with three significant figures, you can write it as 1.26 x 10^(-2) mol dm^-3. This way, you round the answer to three significant figures (1.26) and retain the appropriate power of 10 (-2).
Therefore, the correct answer is 1.26 x 10^(-2) mol dm^-3, not 1 x 10^(-1.1) or 1.1 x 10^(-1).