Obeservation when metal is added to acid : Magnesium (White precipitate is formed, magnesium is dissoleved and bubbling occurs and forms a colourless solution) , Iron (Green precipitate is formed and the iron fillings sank to the bottom) , Zinc (Zinc dissolved in the acid) , Copper (the copper turnings sank to the bottom)
Effect f gas on burning(lighted) splint: Magnesium (Lighted out the bruning splint with a 'pop' sound), Iron (lighted out buring splint with a 'pop' sound), Zinc (lighted out the burning splint with a 'pop' sound)
Effect of gas on damp litmus paper: Magnesium (Damp red litmus paper remained red) , Iron(red), Zinc(red)
Effect of gas on blue litmus paper: Magenuium (blue) , Iron (blue)
Chemical formula of gas : H2
1. hydrogen gas
2. dilute acid + metal -> Hydrogen gas + salt
3. A burning splint can be placed near the mouth of the test tube containing the dilute acids and metal and the gas formed. If a 'pop' sound will be heard if the gas hydrogen.
4. It is neutral.
5. magnesium, iron, zinc, copper.
1(a) Magnesium + hydrochloric acid -> hydrogen gas + magnesium chloride
(b) Mg(s) + 2HCl2(aq) + H2(g)
2(a) iron + hydrochloric acid-> zinc chloride + hydrogen gas
(b) Zn + 2HCl ->ZnCl2 + H2
3(a) zinc + hydrochloric acid -> zinc chloride + hydrogen gas
(b) Zn + 2HCl -> ZnCl2 + H2
4(a) magnesium + sulfuric acid ->Magnesium sulfate + water
(b) Mg(OH)2 + H2SO4 -> MgSO4 + 2H2O
5(a) iron + sulfuric acid -> Iron sulfate + hydrogen gas
(b) Fe(s) + H2SO4(aq) -> FeSO4(aq) + H2(aq)
7(a) magnesium + nitric acid -> magnesium nitrate + hydrogen gas
(b) Mg + HNO3 -> MgNO3 + H
8(a) iron + nitric acid -> iron nitrate + hydrogen gas
(b) Fe(s) +HNO3 -> H0g) + FeNO(l)
9(a) zinc + nitric acid -> zinc nitrate + hydrogen gas
(b) Zn(s) + HNO3(aq)-> H2(aq) + Zn(NO3)2(aq)
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