energe change s

• acid + base → salt + water
• acid + metal oxide → salt + water
• acid + metal hydroxide → salt + water
• acid + metal carbonate → salt + water + carbon dioxide
• hydrochloric acid + copper oxide → copper chloride + water
• hydrochloric acid + sodium carbonate → sodium chloride + water + carbon dioxide
• acid + metal → salt + hydrogen
• metal + water → metal hydroxide + hydrogen