初三化学计算题专题复习

Mn55Mg24Fe56Zn65Al27Ca40Cl35.5K39Cu64H1O16C12Na23S32N14Si28Ba1371301AMgAlBZnFeCMgFeDAlFe15.6gH2SO4H20.2gABCD295gAgNO3300gANaClBAlCl3CKClDCaCl23ZnMgAlCu2,5.6g0.20gH2A.CuMgB.ZnAlC.MgAlD.ZnCu428%NH4HCO3(NH4)2SO4NH4NO3CO(NH2)2ABCD220g20%NaOH20g20%H2SO4ABCD1AFeSBFeCO3CFe2O3DFe3O42A.11B.11.25C.11.5D.12335A.B.C.D.3HCHO10%A12%B10%C8%D6%1NaHSMgSO4NaHSO320%A.35%B.25%C.65%D.2NaMgAlANaMgAlBNaMgAl23:12:9CNaMgAlDNaMgAl3:2:112031.6g20g50gA24.0%B286C316D4002100g10%10g10%10g10g10g()A.B.C.D.3ZnCl2()AZnBZnOCZn(OH)2DZnCO34Na2CO3NaHCO3Na2CO3+HCl=NaHCO3+NaClNaHCO3+HCl=NaCl+CO2+H2OCO21.98g/LCO21gCO2V=mL2HCl?Na2CO3NaHCO30.1%0.01g1KCl03MnO2a%t2MgFeZn3FeZnmtAtOa%CtOa%BtOa%DtOa%CO2mLg51015205560222VtAH2ZnMgFetCH2tBH2tDH2FeMgZnMgZnFeMgFeZnZnFetAmZnFetCmtBmFeZntDFeZnm45()ABCDABCD640g20A.9.8gB.40g27.375%C.D.20g/g02060NaOH/g7100gBaCl2HCl10%Na2CO3Na2CO312g/g0106g212gNa2CO3/gABtAPH7tBH2tCtD/%/g/g/g/g/gpH70000AlMg3Na2CO3B0.1%850.00gCu1Cu2H235/g202040/g10012080/g0.40.40.41_____g23____________0.1%1279.30118.95158.60198.25m1m239.65/g/g37.0040.2543.5046.7550.00m1m233.75/g/g150g/g51015CO2/g1.763.524.424g20g4()5g5g5g5g3g2glg1g(1)(2)(0.1)31kg10.76g1.29gNa2SO4MgCl2NaClMgSO4/500g78412121t15.6gA5.61gB8.00gC4.2gD6.11g2100g9.8%A7gB5gC4gD3g3H2SO40.44gCaOA100gCaCO3B0.48gMgC0.924gMgCO3D0.44gCuAl411.2gCaOCaC03A11.2gB.176gC.20gD.224g6COCO2BaOH2A11B12C2844D1812091COCO264%10gA10gB20gC30gD40g2(1)FeH2Cu(2)CuOCuSO4CuA.B.C.D.1B1A2B3CD4D2A1D2B3A3B1C2BC1A2B3C4154442444mLCO20.88gCO2HClxgNaHCO3+HCl=NaCl+CO2+H2O36.544x0.88gx=0.73g0.73(15-5)100%=7.3%5gygNa2CO3zgNaHCO3Na2CO3+HCl=====NaHCO3+NaCl10636.584CuOFe4441.98/0.881000mL/LmLgLgy5g7.3%zy=1.06g.z=0.84g.556mLCO2[556mL(1000mL)]1.98g/L=1.10g556mLCO2NaHCO3mNaHCO3+HCl=NaCl+CO2+H2O8444m1.10gm=2.10gNaHCO32.1g0.84g=1.26gHCl7.3%Na2CO31.06g.NaHCO31.26g1B2A3C4B5B6A74.4g8.18133.75gCu100%67.5%50.00g2H2xHClyZn+2HCl=ZnCl2+H26573250.00g-33.75g=16.25gyxx=0.5gy=18.25g3198.25g+0.5g-16.25g=182.5g18.25g=100%10%182.5g67.5%H20.5g10%5180g256%333.5%180%14.6%2(1)75(2)5g3g15gxCaC03+2HCl===CaCl2+H20+C02100733gx73100=xg3x=2.19ggg1519.2100=14.68436.5z5.07.3%g8444m1.10g10636.5y5.07.3%g3NaClMgSO4NaCl1000kg10.76g/kg(23/58.5)(4/500)=218.9MgSO41000kg1.29g/kg(24/120)(12/500)=154.81D2A3BC4C6D7A8C3H25.6g0.20g0.20g