Chemistry, 20.08.2019 13:00 davistakeisha95
Which half-reaction equation represents the
reduction of a potassium ion?
(1) k+ + e-- ==> k (3) k+ ==> k + e--
(2) k + e-- ==> k+ (4) k==> k+ + e--
Answers: 2
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In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.
Answers: 2
Which half-reaction equation represents the
reduction of a potassium ion?
(1) k+ + e--...
reduction of a potassium ion?
(1) k+ + e--...
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