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26 tháng 4 2023

\(n_{CaCO_3}=\dfrac{20}{100}=0,2\left(mol\right)\\ a,PTHH:CaCO_3+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Ca+CO_2+H_2O\\ b,n_{CO_2}=n_{\left(CH_3COO\right)_2Ca}=n_{CaCO_3}=0,2\left(mol\right)\\ b,V_{CO_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\\ c,m_{\left(CH_3COO\right)_2Ca}=0,2.158=31,6\left(g\right)\\ d,C_4H_{10}+\dfrac{5}{2}O_2\rightarrow2CH_3COOH+H_2O\\ n_{C_4H_{10}\left(LT\right)}=\dfrac{0,4}{2}=0,2\left(mol\right)\\ n_{C_4H_{10}\left(TT\right)}=0,2:50\%=0,4\left(mol\right)\\ m_{C_4H_{10}\left(tt\right)}=58.0,4=23,2\left(g\right)\)

26 tháng 4 2023

\(n_{BaCO_3}=\dfrac{19,7}{197}=0,1\left(mol\right)\\ a,PTHH:BaCO_3+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Ba+CO_2+H_2O\\ n_{CO_2}=n_{\left(CH_3COO\right)_2Ba}=n_{BaCO_3}=0,1\left(mol\right)\\ b,V_{CO_2\left(đktc\right)}=0,1.22,4=2,24\left(l\right)\\ c,m_{\left(CH_3COO\right)_2Ba}=255.0,1=25,5\left(g\right)\\ d,C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\\ n_{CH_3COOH}=0,1.2=0,2\left(mol\right);n_{C_2H_5OH\left(LT\right)}=n_{CH_3COOH}=0,2\left(mol\right)\\ n_{C_2H_5OH\left(TT\right)}=0,2.75\%=0,15\left(mol\right)\\ m_{C_2H_5OH\left(TT\right)}=0,15.46=6,9\left(g\right)\)

5 tháng 12 2021

\(n_{HCl}=\dfrac{18.25}{36.5}=0.5\left(mol\right)\)

\(a.Mg+2HCl\rightarrow MgCl_2+H_2\)

\(b.\)

\(n_{Mg}=n_{H_2}=\dfrac{1}{2}\cdot n_{HCl}=\dfrac{1}{2}\cdot0.5=0.25\left(mol\right)\)

\(m_{Mg}=0.25\cdot24=6\left(g\right)\)

\(V_{H_2}=0.25\cdot22.4=5.6\left(l\right)\)

\(c.\)

\(V_{H_2\left(tt\right)}=5.6\cdot90\%=5.04\left(l\right)\)

26 tháng 4 2023

\(n_{Mg}=\dfrac{4,8}{24}=0,2\left(mol\right)\\ a,PTHH:Mg+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Mg+H_2\\ n_{H_2}=n_{\left(CH_3COO\right)_2Mg}=n_{Mg}=0,2\left(mol\right);n_{CH_3COOH}=2.0,2=0,4\left(mol\right)\\ b,V_{H_2\left(đktc\right)}=0,2.22,4=4,48\left(l\right)\\ c,m_{\left(CH_3COO\right)_2Mg}=142.0,2=28,4\left(g\right)\\ d,m_{ddCH_3COOH}=\dfrac{0,4.60.100}{12}=200\left(g\right)\)

27 tháng 4 2023

\(n_{Zn}=\dfrac{19,5}{65}=0,3\left(mol\right)\\ a,PTHH:Zn+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2\\ b,n_{H_2}=n_{\left(CH_3COO\right)_2Zn}=n_{Zn}=0,3\left(mol\right);n_{CH_3COOH}=2.0,3=0,6\left(mol\right)\\ b,V_{H_2\left(đkc\right)}=24,79.0,3=7,437\left(l\right)\\ c,m_{\left(CH_3COO\right)_2Zn}=0,3.183=54,9\left(g\right)\\ d,C_2H_5OH+CH_3COOH\rightarrow CH_3COOC_2H_5+H_2O\\ n_{Este\left(LT\right)}=n_{CH_3COOH}=0,6\left(mol\right)\\ n_{este\left(TT\right)}=80\%.0,6=0,48\left(mol\right)\\ m=m_{este\left(TT\right)}=88.0,48=42,24\left(g\right)\)

a+b) PTHH: \(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\uparrow\)

Ta có: \(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}n_{HCl}=0,2\left(mol\right)\\n_{CO_2}=0,1\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{HCl}=0,2\cdot36,5=7,3\left(g\right)\\V_{CO_2}=0,1\cdot22,4=2,24\left(l\right)\end{matrix}\right.\)

c) Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=0,1\left(mol\right)\\n_{NaOH}=\dfrac{50\cdot40\%}{40}=0,5\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\) Tạo muối trung hòa, bazơ dư, tính theo CO2

Bảo toàn Cacbon: \(n_{Na_2CO_3}=n_{CO_2}=0,1\left(mol\right)\) \(\Rightarrow m_{Na_2CO_3}=0,1\cdot106=10,6\left(g\right)\)

1 tháng 11 2023

a, \(Na_2CO_3+2HCl\rightarrow2NaCl+CO_2+H_2O\)

b,\(n_{Na_2CO_3}=\dfrac{21,2}{106}=0,2\left(mol\right)\)

Theo PT: \(n_{HCl}=2n_{Na_2CO_3}=0,4\left(mol\right)\)

\(\Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)

c, \(n_{CO_2}=n_{Na_2CO_3}=0,2\left(mol\right)\)

\(\Rightarrow V_{CO_2}=0,2.22,4=4,48\left(l\right)\)

a) 2CH3COOH + Na2CO3 --> 2CH3COONa + CO2 + H2O

b) \(n_{CH_3COOH}=\dfrac{200.12\%}{60}=0,4\left(mol\right)\)

PTHH: 2CH3COOH + Na2CO3 --> 2CH3COONa + CO2 + H2O

                     0,4------->0,2------------------------->0,2

=> \(m_{Na_2CO_3}=0,2.106=21,2\left(g\right)\)

=> \(m_{dd.Na_2CO_3}=\dfrac{21,2.100}{50}=42,4\left(g\right)\)

c) \(V_{CO_2}=0,2.22,4=4,48\left(l\right)\)

7 tháng 5 2022

2CH3COOH + Zn -- > (CH3COOH)2Zn + H2

nH2 = 2,24 / 22,4 = 0,1 (mol)

=> nCH3COOH = 0,2 (mol)

mZn = 0,1. 65 = 6,5 (g)

mH2 = 0,1.2 = 0,2 (g)

mdd  = 300 + 6,5 - 0,2 = 306,3 (g)

mCH3COOH = 0,2 . 60 = 12 (g)

=> C%CH3COOH = ( 12.100 ) / 306,3 = 4%

m(CH3COO)2Zn = 0,1 . 183 = 18,3 (g)

=> (18,3.100) / 306,3 = 6%