山城25達
2019-2-28 23:40:01
點解total mole of cacl2 系2個ca2+ product加埋而5系2個mole of cacl2 reactants 加埋ge
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化學艾維斯
2019-2-28 23:46:09
邊度有兩個Ca reactant
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佢step 1係mix NaOH and CaCl2 to form Ca(OH)2
Ca(OH)2 slightly soluble 當佢saturated時會form Ca(OH)2(s) 即係果2.222g precipitate
filter後個solution就係saturated Ca(OH)2(aq)
再add excress K2SO4 to form CaSO4(s) 即係6.81g precipitate
比你做到 SO2 acidic咪又將Fe oxidize返做Fe2+