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Observation when acid reacts with metal
Effervescence seen
Test tube feels warmer
Metal smaller in size
Solution may change colour
Products formed in acid and metal reaction
Acid + metal —> salt + hydrogen gas
Determine presence of hydrogen
Place a lighted splint at mouth of test tube if hydrogen is present, the splint extinguished with a ‘pop’ sound
Name of salt formed
Metal ion by non metal ion from acid ( hydrochloride acid → ( metal ) chloride )