Across
- 1. during a double displacement reaction, _____ are exchanged
- 4. brown gas produced during the decomposition of lead nitrate
- 6. CaO + H20 is a ______ reaction (exothermic/endothermic)
- 7. substance that speeds up a chemical reaction
Down
- 2. common name of calcium hydroxide
- 3. an insoluble solid formed during a double displacement reaction
- 5. a substance that undergoes a chemical change in a reaction