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nikdorinn [45]
3 years ago
8

Calculate the pH of a solution that has [H30*] = 5.2 x 10-7M

Chemistry
1 answer:
miss Akunina [59]3 years ago
8 0

Answer:

pH ≈ 6.3

Explanation:

To calculate the pH of an aqueous solution, you need to know the hydronium ion (H₃O+) concentration in moles per liter (molarity).  The pH is then calculated using the expression:

      pH = - log [H₃O+]

Since the solution has an H₃O+ ion concentration of 5.2 × 10⁻⁷ M, we can plug that in and solve:

      pH = - log [5.2 × 10⁻⁷]

      pH = 6.28

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Answer:

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First, detemine the mass of oxygen in the two samples by difference:

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Item                     Compound 1                        Compound 2

Sample                80.0 g                                    80.0 g

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Second, determine the ratios of the masses of carbon that combine with 1.00 g of oxygen:

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Compound 1      21.8 g / 58.2 g =  0.375

Compound 2     34.3 g / 45.7 g = 0.751

Third, determine the ratio of the masses of carbon between the two compounds.

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