Question

three experiments were carried out to compare the speed of reaction of 2.5g of granulated zinc with 25.0cm³of different dilute acids.the different variables and time taken to produce 30cm³of hydrogen gas for each experiment were recorded in the following table:

EXPIREMENT 1 2 3


dilute acid used H² SO4 HCl HCl

volume of acid use/ 25.0 25.0 25.0
cm³

amount of copper II
sulfate/drops 0 0 0

time taken/s 28.0 56.0 14.0

(a) write down the ionic equations for the reaction between zinc and the dilute acids.
(b) explain why the time taken is collected 30cm³ of hydrogen gas is shorter in
(i) experiment I than in II
(ii) experiment III than in II

Answer 1

Answer:

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