Câu 1:
Zn+2HCl−−−>ZnCl2+H2" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">Zn+2HCl−−−>ZnCl2+H2Zn+2HCl−−−>ZnCl2+H2 (1)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">(1)(1)
Fe+2HCl−−−>FeCl2+H2" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">Fe+2HCl−−−>FeCl2+H2Fe+2HCl−−−>FeCl2+H2 (2)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">(2)(2)
a)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">a)a)
mFe=60,5.46,289100=28(g)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">mFe=60,5.46,289100=28(g)mFe=60,5.46,289100=28(g)
=>nFe=2856=0,5(mol)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">=>nFe=2856=0,5(mol)=>nFe=2856=0,5(mol)
=>mZn=60,5−28=32,5(g)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">=>mZn=60,5−28=32,5(g)=>mZn=60,5−28=32,5(g)
=>nZn=32,565=0,5(mol)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">=>nZn=32,565=0,5(mol)=>nZn=32,565=0,5(mol)
b)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">b)b)
Theo PTHH (1) và (2) nH2=0,5+0,5=1(mol)" role="presentation" style="box-sizing: inherit; display: inline-table; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">nH2=0,5+0,5=1(mol)nH2=0,5+0,5=1(mol)
=>VH2(đktc)=1.22,4=22,4(l)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">=>VH2(đktc)=1.22,4=22,4(l)=>VH2(đktc)=1.22,4=22,4(l)
c)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">c)c)
Theo (1) nZnCl2=nZn=0,5(mol)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">nZnCl2=nZn=0,5(mol)nZnCl2=nZn=0,5(mol)
=>mZnCl2=0,5.136=68(g)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">=>mZnCl2=0,5.136=68(g)
Câu 2:
CuO + H2SO4 → CuSO4 + H2O
0,2...............0,2.............0,2..............................................(mol)
mdd H2SO4=0,2.9820%=98(gam)⇒mdd sau pư=98+0,2.80=114(gam)mCuSO4=0,2.160=32(gam)⇒mH2O=114−32=82(gam)" role="presentation" style="box-sizing: inherit; line-height: 0; text-align: center; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 16.965em; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; width: 10000em; position: relative; display: table-cell !important;">mdd H2SO4=0,2.9820%=98(gam)⇒mdd sau pư=98+0,2.80=114(gam)mCuSO4=0,2.160=32(gam)⇒mH2O=114−32=82(gam)mdd H2SO4=0,2.9820%=98(gam)⇒mdd sau pư=98+0,2.80=114(gam)mCuSO4=0,2.160=32(gam)⇒mH2O=114−32=82(gam)
Gọi nCuSO4.5H2O=a(mol)" role="presentation" style="box-sizing: inherit; display: inline-block; line-height: 0; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;">nCuSO4.5H2O=a(mol)nCuSO4.5H2O=a(mol).
Sau khi tách tinh thể, dung dịch còn :
mCuSO4=32−160a(gam)mH2O=82−18.5a=82−90a(gam)" role="presentation" style="box-sizing: inherit; display: inline-table; line-height: 0; text-align: center; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 15.928em; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; width: 10000em; position: relative;">mCuSO4=32−160a(gam)mH2O=82−18.5a=82−90a(gam)mCuSO4=32−160a(gam)mH2O=82−18.5a=82−90a(gam)
Suy ra:
32−160a82−90a=17,4100⇒a=0,12284⇒mCuSO4.5H2O=0,12284.250=30,71(gam)" role="presentation" style="box-sizing: inherit; line-height: 0; text-align: center; font-size: 18.08px; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 19.355em; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; width: 10000em; position: relative; display: table-cell !important;">32−160a82−90a=17,4100⇒a=0,12284⇒mCuSO4.5H2O=0,12284.250=30,71(gam)
Có vấn đề gì mong anh chị thông cảm ạ!