Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) nCH3COOH= 0,4(mol)
PTHH: CH3COOH + NaOH -> CH3COONa + H2O
0,4____________0,4(mol)
=> mNaOH=0,4. 40=16(g)
b) nCH3COOH= 1(mol)
nC2H5OH= 100/46= 50/23(mol)
Vì : 1/1< 50/23 :1
=> C2H5OH dư, CH3COOH hết, tính theo nCH3COOH.
PTHH: CH3COOH + C2H5OH \(⇌\) CH3COOC2H5 + H2O (đk: H+ , nhiệt độ)
Ta có: nCH3COOC2H5(thực tế)= 0,625(mol)
Mà theo LT: nCH3COOC2H5(LT)= nCH3COOH=1(mol)
=>H= (0,625/1).100=62,5%
a)
$C_2H_5OH + CH_3COOH \buildrel{{H_2SO_4,t^o}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O$
b)
n CH3COOC2H5 = n C2H5OH = 9,2/46 = 0,2(mol)
=> m este = 0,2.88 = 17,6 gam
c)
n este = 8,8/88 = 0,1(mol)
=> n C2H5OH = n CH3COOH = 0,1/60% = 1/6 mol
=> m C2H5OH = 46 . 1/6 = 7,67(gam) ; m CH3COOH = 60 . 1/6 = 10(gam)
a, Ta có: \(n_{CH_3COOH}=\dfrac{9,6}{60}=0,16\left(mol\right)\)
PT: \(Mg+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Mg+H_2\)
Theo PT: \(n_{\left(CH_3COO\right)_2Mg}=\dfrac{1}{2}n_{CH_3COOH}=0,08\left(mol\right)\)
\(\Rightarrow m_{\left(CH_3COO\right)_2Mg}=0,08.142=11,36\left(g\right)\)
b, PT: \(CH_3COOH+C_2H_5OH\underrightarrow{t^o,xt}CH_3COOC_2H_5+H_2O\)
Theo PT: \(n_{CH_3COOC_2H_5\left(LT\right)}=n_{CH_3COOH}=0,16\left(mol\right)\)
\(\Rightarrow m_{CH_3COOC_2H_5\left(LT\right)}=0,16.88=14,08\left(g\right)\)
Mà: thực tế thu được 10,56 (g)
\(\Rightarrow H\%=\dfrac{10,56}{14,08}.100\%=75\%\)
\(a)n_{CH_3COOH} = 0,2.2 = 0,4(mol)\\ Mg + 2CH_3COOH \to (CH_3COO)_2Mg + H_2\\ n_{Mg} = \dfrac{1}{2}n_{CH_3COOH} = 0,2(mol)\\ m_{Mg} = 0,2.24 = 4,8(gam)\\ b)\\ CH_3COOH + C_2H_5OH \buildrel{{H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O\\ n_{CH_3COOH\ pư} = n_{este} = \dfrac{24,64}{88} = 0,28(mol)\\ H = \dfrac{0,28}{0,4}.100\% = 70\%\)
2C2H5OH+Na->2C2H5ONa +H2
0,3------------------------------------0,15
2CH3COOH+Na->2CH3COONa+H2
0,1-------------------------------------->0,05
NaOH+CH3COOH->CH3COONa+H2O
0,1-------0,1 mol
n khí =4,48 \22,4=0,2 mol
n NaOH=0,5.0,2=0,1 mol
=>nH2 pt2=0,05
=>n H2 pt1=0,15
=>mC2H5OH=0,3.46=13,8g
=>m CH3COOH=0,1.60=6g
a.b.\(n_{Mg}=\dfrac{4,8}{24}=0,2mol\)
\(2Mg+2CH_3COOH\rightarrow2\left(CH_3COO\right)_2Mg+H_2\)
0,2 0,2 0,2 ( mol )
\(C_{M_{CH_3COOH}}=\dfrac{0,2}{0,2}=1M\)
\(m_{\left(CH_3COO\right)_2Mg}=0,2.142=28,4g\)
c.Sửa đề: thu được 9,2g este
\(n_{CH_3COOC_2H_5}=\dfrac{9,2}{88}=0,1mol\)
\(CH_3COOH+C_2H_5OH\rightarrow CH_3COOC_2H_5+H_2O\)
Thực tế: 0,2 0,1 ( mol )
Lý thuyết: 0,1 0,1 ( mol )
\(H=\dfrac{0,1}{0,2}.100=50\%\)