The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 5.4 x 10–14.
A. 14.7
B. 13.3
C. 14.0
D. -14.7
It's actually 13.2 but i think that's what you meant to put so C.
To find the pH level of a liquid with [H+] = 5.4 x 10^(-14), we can use the formula pH = -log[H+].
Substituting the given value in the formula, we get:
pH = -log(5.4 x 10^(-14))
Now we can calculate the pH level by taking the logarithm and negating the result:
pH ≈ -(-13.27) ≈ 13.3
Therefore, the pH level of the liquid is approximately 13.3.
The correct answer is B. 13.3.
To find the pH level of a liquid with a given concentration of hydrogen ions [H+], you can use the formula pH = -log[H+]. In this case, the concentration of hydrogen ions is 5.4 x 10–14.
Step 1: Take the negative logarithm (base 10) of the concentration of hydrogen ions:
-log(5.4 x 10^-14)
Step 2: Simplify the expression:
pH = -log(5.4) - log(10^-14)
Step 3: Since log(10^-14) is equal to -14, the expression becomes:
pH = -log(5.4) - (-14)
Step 4: Simplify further by using the property that -(-14) is the same as adding 14 to the expression:
pH = -log(5.4) + 14
Step 5: Calculate the logarithm part using a calculator:
pH ≈ -(-0.732) + 14 (log value for 5.4 is approximately 0.732)
pH ≈ 0.732 + 14
pH ≈ 14.732
To the nearest tenth, the pH level of this liquid is approximately 14.7.
Therefore, the correct answer is option A. 14.7.