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Bogdan [553]
2 years ago
8

Select the correct statement.

Chemistry
1 answer:
jok3333 [9.3K]2 years ago
7 0
D) basic ions contain some H+ ions
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A 2.36-gram sample of NaHCO3 was completely decomposed in an experiment.
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Explanation:

a) The mass of the reactants is 2.36 grams, and the mass of the products is 1.57 grams plus the mass of the carbonic acid. Thus, using the law of conservation of mass, we get the mass of the carbonic acid is 2.36 - 1.57 =  0.79 grams.

b) The gram-formula mass of sodium bicarbonate is 84.006 g/mol, meaning that 2.36/84.006 = 0.028 moles were consumed. Thus, this means that in theory, 0.014 moles of carbonic acid should have been produced, which would have a mass of (0.014)(62.024)=0.868 grams. Thus, the percentage yield is (0.79)/(0.868) * 100 = 91%

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