Metal hydroxide precipitates formed by adding few drops of a 1M solution of sodium hydroxide (NaOH) to 0.2 M solutions containing various metal salts. Left to right: (1) aluminum hydroxide (Al(OH)3),Al2(SO4)3 + NaOH -> Al(OH)3 + Na2SO4; (2) copper (II) hydroxide (Cu(OH)2),CuCl2 + NaOH -> Cu(OH)2 + NaCl; (3) cobalt hydroxide (Co(OH)2,CoCl2 + NaOH -> Co(OH)2 + NaCl; (4) iron (III) hydroxide (Fe(OH)3),FeCl3 + NaOH -> Fe(OH)3 + NaCl; (5) iron (II) hydroxide (Fe(OH)2),FeSO4 + NaOH -> Fe(OH)2 + Na2SO4; (6) zinc hydroxide (Zn(OH)2),ZnSO4 + NaOH -> Zn(OH)2 + Na2SO4. These are examples of a double replacement reaction | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
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