Calculating pH Using the [H_{3}O^{+}]
Determine the pH for the following solutions :
a. [H_{3}O^{+}]=1.0 ×10^{-5} M b. [H_{3}O^{+}]=5×10^{-8} M
a. Step 1 Enter the [H_{3}O^{+}].
Step 2 Press the log key and change the sign.
\boxed{log} \boxed{+/- } 5
Step 3 Adjust the number of SFs on the right of the decimal point to equal the SFs in the coefficient.
b. Step 1 Enter the [H_{3}O^{+}]
.
pH=-log[5\times 10^{-8}] =5 \boxed{EE or EXP} 8 \boxed{+/- } \overset{Calculator Display}{5^{-08} or 5 E-08 }Step 2 Press the log key and change the sign
\boxed{log} \boxed{+/- } 7.301029
Step 3 Adjust the number of SFs on the right of the decimal point to equal the SFs in the coefficient.