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What is the molar concentration of H3O+
in a cola that has a pH of 2.670?

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Answer: To calculate the molar concentration of H3O+ (hydronium ions) in a solution given its pH, you can use the formula:

pH = -log[H3O+]

where [H3O+] represents the molar concentration of hydronium ions in moles per liter (mol/L).

Given the pH of the cola solution as 2.670, we can plug this value into the equation:

2.670 = -log[H3O+]

To find [H3O+], we need to isolate it on one side of the equation. First, divide both sides by -1:

-2.670 = log[H3O+]

Now, we need to undo the logarithm. Since the pH value represents the negative logarithm, we can use the antilogarithm (10^x) to find [H3O+]:

[H3O+] = 10^(-2.670)

Using a calculator, the molar concentration of H3O+ in the cola solution is approximately 0.002677 mol/L.

So, the molar concentration of H3O+ in the cola is approximately 0.002677 mol/L.

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