Table 9 Improvement of scores of questions on chemical reaction between acid and metal
From: Practice supporting system with related problem set generator based on targeted educational effects
Number of correct answers pre-test/post-test (gain) | ||
|---|---|---|
Group C | Group E | |
Q-A) Describe the reaction formula when Ca and H2SO4 react. | 2/2 (+0) | 2/2 (+0) |
Q-B) Describe the reaction formula when Cu and H2SO4 react. | 0/0 (+0) | 0/3 (+3) |
Q-C) In general, how do acids and metals react? | 0/0 (+0) | 0/2 (+2) |
Q-D) Do the following combinations of materials cause chemical reactions? | ||
(a) Na and H2SO4 | 3/4 (+1) | 4/4 (+0) |
(b) Cu and HCl | 1/1 (+0) | 1/2 (+1) |
Q-E) Do the following combinations of materials cause the production of H2 gas? | ||
(a) Pb and HCl | 2/3 (+1) | 3/4 (+1) |
(b) Ag and H2SO4 | 1/3 (+2) | 0/2 (+2) |