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一、计算规律设化合价为 +ｘ,相对原子质量为Ａｒ的活泼金属Ｍ与足量的稀硫酸反应 ,则有 :2Ｍ +ｘＨ2 ＳＯ4 =Ｍ2 (ＳＯ4 ) ｘ+ｘＨ2 ↑ (ｘ为奇数 )2Ｍ +ｘＨ2 ＳＯ4 =2Ｍ(ＳＯ4 ) ｘ2 +ｘＨ2 ↑ (ｘ为偶数 )根据化学方程式计算可得 :ｍＨ2 =ｍ金 × ｘＡｒ或ｍ金 =ｍＨ2 ×
First, the calculation rule Let the valence is +x, and the reactive metal M with relative atomic mass Ar reacts with a sufficient amount of dilute sulfuric acid, then there are: 2M + xH2 SO4 = M2 (SO4) x + xH2 ↑ (x is an odd number) 2M + xH2 SO4 = 2M(SO4) x2 + xH2 ↑ (x is an even number) Obtained from the chemical equation: mH2 = m gold × xAr or m gold = mH2 ×