Item SC067003: When two liquids are mixed together and a solid forms, the solid is a new substance that was formed during a chemical reaction between the two liquids.
A student mixes two different liquids together. After mixing the liquids, a solid substance forms that cannot be turned back into the starting liquids. The student claims that a chemical reaction occurred. Why is the student correct?
- Because a solid substance is always formed during a chemical reaction
- Because a new substance is always formed during a chemical reaction
- Because a chemical reaction always occurs when two substances are mixed together
- Because the products of a chemical reaction can never be turned back into the starting substances
Answer Choice |
Overall |
Grades |
Gender |
Language |
||||
|---|---|---|---|---|---|---|---|---|
| 6–8 | 9–12 | Male | Female | Primary Language is English | Primary Language is not English | |||
| A. | Because a solid substance is always formed during a chemical reaction | 9% | 9% | 9% | 10% | 8% | 9% | 13% |
| B. | Because a new substance is always formed during a chemical reaction | 39% | 37% | 41% | 40% | 38% | 40% | 34% |
| C. | Because a chemical reaction always occurs when two substances are mixed together | 17% | 18% | 16% | 17% | 17% | 16% | 23% |
| D. | Because the products of a chemical reaction can never be turned back into the starting substances | 35% | 36% | 34% | 34% | 36% | 35% | 30% |