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Ta có : nNaOH = 0,1 (mol)
PTHH :
CH3COOH + NaOH - > CH3COONa + H2O
0,1mol...........0,1mol
a) Ta có :
m(giấm ) = 0,1.60 = 6(g)
=> m(rượu) = 12,9 - 6 = 6,9(g)
b) \(C2H5OH+CH3COOH\xrightarrow[t0]{H2SO4,đặc}CH3COOC2H5+H2O\)
0,1mol...................0,1mol........................0,1mol
=> m(este)(lý thuyết) = 0,1.88 = 8,8(g)
=> H = \(\dfrac{m\left(thực-tế\right)}{m\left(lý-thuyết\right)}.100=\dfrac{7,04}{8,8}.100=80\%\)
\(CaCO_3+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Ca+CO_2+H_2O\\ a,n_{CH_3COOH}=0,2.1=0,2\left(mol\right)\Rightarrow n_{CO_2}=\dfrac{0,2}{2}=0,1\left(mol\right)\Rightarrow V_{CO_2\left(đktc\right)}=0,1.22,4=2,24\left(l\right)\\ b,CH_3COOH+C_2H_5OH⇌\left(H^+,t^o\right)CH_3COOC_2H_5+H_2O\\ n_{CH_3COOH}=\dfrac{50}{200}.0,2=0,05\left(mol\right)\\ n_{C_2H_5OH}=\dfrac{23}{46}=0,5\left(mol\right)\\ Vì:\dfrac{0,5}{1}>\dfrac{0,05}{1}\Rightarrow Rượu.dư\\ \Rightarrow n_{este\left(LT\right)}=n_{axit}=0,05\left(mol\right)\\ \Rightarrow n_{este\left(TT\right)}=80\%.0,05=0,04\left(mol\right)\\ m_{CH_3COOC_2H_5}=88.0,04=3,52\left(g\right)\)
\(a,n_{NaOH}=1,5.0,2=0,3\left(mol\right)\\ n_{H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
PTHH:
CH3COOH + NaOH ---> CH3COONa + H2O
0,3<-----------0,3
2CH3COOH + 2Na ---> 2CH3COONa + H2
0,3----------------------------------------------->0,15
2C2H5OH + 2Na ---> 2C2H5ONa + H2
0,2<---------------------------------------0,1
=> m = 0,2.46 +0,3.60 = 27,2 (g)
b) \(\left\{{}\begin{matrix}\%m_{CH_3COOH}=\dfrac{0,3.60}{27,2}.100\%=66,18\%\\\%m_{C_2H_5OH}=100\%-66,18\%=33,82\%\end{matrix}\right.\)
CH3COOH + NaOH $\to$ CH3COONa + H2O
n CH3COOH = n NaOH = 0,05(mol)
=> n C2H5OH = (7,6 - 0,05.60)/46 = 0,1(mol)
\(CH_3COOH + C_2H_5OH \buildrel{{H_2SO_4,t^o}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O\)
n CH3COOH = 0,05 < n C2H5OH = 0,1 nên hiệu suất tính theo số mol CH3COOH
n CH3COOC2H5 = n CH3COOH pư = 0,05.60% = 0,03 mol
=> m este = 0,03.88 = 2,64 gam
\(n_{CH_3COOH}=0,2\cdot0,1=0,02mol\)
a)\(2CH_3COOH+Mg\rightarrow\left(CH_3COO\right)_2Mg+H_2\)
0,02 0,01 0,01 0,01
b)\(V_{H_2}=0,01\cdot22,4=0,224l=224ml\)
\(m_{Mg}=0,01\cdot24=0,24g\)
c)\(CH_3COOH+C_2H_5OH\xrightarrow[xtH_2SO_4đ]{t^o}CH_3COOC_2H_5+H_2O\)
0,02 \(\dfrac{1,15}{46}=0,025\) 0,02
\(m_{etylaxetat}=0,02\cdot88=1,76g\)
\(H=80\%\Rightarrow m_{CH_3COOC_2H_5}=1,76\cdot80\%=1,408g\)
CH3COOH+NaOH→CH3COONa+H2O��3����+����→��3�����+�2�
⇒nCH3COOH=nNaOH=0,05.2=0,1mol⇒���3����=�����=0,05.2=0,1���
mCH3COOH=0,1.60=6g���3����=0,1.60=6�
⇒%mCH3COOH=6.10012,9=46,5%⇒%���3����=6.10012,9=46,5%
%mC2H5OH=100−46,5=53,5%%��2�5��=100−46,5=53,5%
b,
nC2H5OH=12,9−646=0,15mol��2�5��=12,9−646=0,15���
CH3COOH+C2H5OH⇌CH3COOC2H5+H2O��3����+�2�5��⇌��3����2�5+�2�
Theo lí thuyết tạo 0,1 mol este.
⇒H=7,04.10088.0,1=80%