Chemistry, 07.10.2019 10:50 Disd112984
Which of the following sentence best describes a buffer? a. buffer is a substance that resists small change in the acidity of a solution when an acid or base is added to the solution.
b. a chemical substance that prevents changes in hydrogen ion concentration.
Answers: 2
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Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
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Which of the following sentence best describes a buffer? a. buffer is a substance that resists smal...
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