\(n_{CuO}=\dfrac{4}{80}=0.05\left(mol\right)\)

\(n_{H_2SO_4}=0.15\cdot1=0.15\left(mol\right)\)

\(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)

\(TC:\dfrac{0.05}{1}< \dfrac{0.15}{1}\Rightarrow H_2SO_4dư\)

\(m_{CuSO_4}=0.05\cdot160=8\left(g\right)\)

\(C_{M_{CuSO_4}}=\dfrac{0.05}{0.15}=0.33\left(M\right)\)

a)

PTHH: CuO + H2SO4 -> CuSO4+ H2O

b) nCuO=0,1(mol); nH2SO4=0,15(mol)

Vì: 0,1/1 < 0,15/1

-> H2SO4 dư, CuO hết, tính theo nCuO

nCuSO4=nH2SO4(p.ứ)=nCuO=0,1(mol)

=>mCuSO4=160.0,1=16(g)

c) nH2SO4(dư)=0,05(mol)

Vddsau=VddH2SO4=0,15(l)

=>CMddH2SO4(dư)=0,05/0,15=1/3(M)

CMddCuSO4=0,1/0,15=2/3(M)

a)

$CuO  + H_2SO_4 \to CuSO_4 + H_2O$
b)

$n_{CuSO_4} = n_{CuO} = \dfrac{4}{80} = 0,05(mol)$
$m_{CuSO_4} = 0,05.160 = 8(gam)$

c)

$C_{M_{CuSO_4}} = \dfrac{0,05}{0,15} = 0,33M$

Ta có: \(n_{Cu\left(NO_3\right)_2}=0,2.1,5=0,3\left(mol\right)\)

PT: \(Cu\left(NO_3\right)_2+2NaOH\rightarrow Cu\left(OH\right)_{2\downarrow}+2NaNO_3\)

_______0,3_______0,6_______0,3_________0,6 (mol)

a, m_Cu(OH)2 = 0,3.98 = 29,4 (g)

b, \(V_{ddNaOH}=\dfrac{0,6}{2}=0,3\left(l\right)\)

c, \(C_{M_{NaNO_3}}=\dfrac{0,6}{0,2+0,3}=1,2M\)

Bạn tham khảo nhé!

a) \(n_{Cu\left(NO_3\right)_2}=1,5.0,2=0,3\left(mol\right)\)

\(Cu\left(NO_3\right)_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)

\(n_{Cu\left(OH\right)_2}=n_{Cu\left(NO_3\right)_2}=0,3\left(mol\right)\)

=> \(m_{Cu\left(OH\right)_2}=29,4\left(g\right)\)

b) \(n_{NaOH}=2n_{Cu\left(OH\right)_2}=0,6\left(mol\right)\)

=> \(V_{NaOH}=\dfrac{0,6}{2}=0,3\left(l\right)\)

c) \(CM_{NaCl}=\dfrac{0,3.2}{0,2+0,3}=1,2M\)

\(200ml=0,2l\\ n_{Na_2CO_3}=0,5.0,2=0,1\left(mol\right)\\ PTHH:Na_2CO_3+2HCl\rightarrow2NaCl+CO_2\uparrow+H_2O\\ \left(mol\right)........0,1\rightarrow...0,2.......0,2..........0,1.........0,1\\ a,C_{M_{HCl}}=\dfrac{0,2}{0,2}=1\left(M\right)\\ b,m_{NaCl}=0,2.58,5=11,7\left(g\right)\\c, V_{ddNaCl}=V_{ddNa_2CO_3}+V_{ddHCl}=0,2+0,2=0,4\left(l\right)\\ C_{M_{NaCl}}=\dfrac{0,2}{0,4}=0,5\left(M\right)\)

Na₂CO₃  +  2HCl  →  2NaCl  +  H₂O  + CO₂

a) nNa₂CO₃ = 0,2.0,5 = 0,1 mol 

Theo tỉ lệ phản ứng => nHCl = 2nNa₂CO₃ = 0,1.2 = 0,2 mol

=> C_HCl = \(\dfrac{n}{V}\) = \(\dfrac{0,2}{0,2}\)=  1M

b) nNaCl = 2Na₂CO₃ = 0,2 mol

=> mNaCl = 0,2.58,5 = 11,7 gam

c) Thể tích dung dịch sau phản ứng = 0,2 + 0,2 = 0,4 lít

=> C_NaCl = \(\dfrac{0,2}{0,4}\)= 0,5M

100ml = 0,1l

150ml = 0,15l

\(n_{NaOH}=1.0,1=0,1\left(mol\right)\)

\(n_{CuSO4}=1,2.0,15=0,18\left(mol\right)\)

a) Pt : \(2NaOH+CuSO_4\rightarrow Na_2SO_4+Cu\left(OH\right)_2|\)

                2                1                1                   1 

              0,1             0,18           0,05              0,05

b) Hiện tượng : màu xanh lam của dung dịch CuSO₄ nhạt dần , xuất hiện kết tủa có màu xanh lơ

c) Lập tỉ số so sánh : \(\dfrac{0,1}{2}< \dfrac{0,18}{1}\)

                  ⇒ NaOH phản ứng hết , CuSO₄ dư

                  ⇒ Tính toán dựa vào số mol của NaOH

\(n_{Cu\left(OH\right)2}=\dfrac{0,1.1}{2}=0,05\left(mol\right)\)

⇒ \(m_{cu\left(OH\right)2}=0,05.98=4,9\left(g\right)\)

d) \(n_{Na2SO4}=\dfrac{0,05.1}{1}=0,05\left(mol\right)\)

\(n_{CuSO4\left(dư\right)}=0,18-\left(\dfrac{0,1.1}{2}\right)=0,13\left(mol\right)\)

\(V_{ddspu}=0,1+0,15=0,25\left(l\right)\)

\(C_{M_{Na2SO4}}=\dfrac{0,05}{0,25}=0,2\left(M\right)\)

\(C_{M_{CuSO4\left(dư\right)}}=\dfrac{0,13}{0,25}=0,52\left(M\right)\)

 Chúc bạn học tốt

a. 2NaOH + CuSO₄ ---> Cu(OH)₂ + Na₂SO₄.

a, \(CuO+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Cu+H_2O\)

b, \(n_{CuO}=\dfrac{8}{80}=0,1\left(mol\right)\)

Theo PT: \(n_{CH_3COOH}=2n_{CuO}=0,2\left(mol\right)\Rightarrow C_{M_{CH_3COOH}}=\dfrac{0,2}{0,2}=1\left(M\right)\)

c, \(n_{\left(CH_3COO\right)_2Cu}=n_{Cu}=0,1\left(mol\right)\Rightarrow m_{\left(CH_3COO\right)_2Cu}=0,1.182=18,2\left(g\right)\)

a, Ta có: \(n_{KOH}=0,15.2=0,3\left(mol\right)\)

PT: \(KOH+HCl\rightarrow KCl+H_2O\)

Theo PT: \(n_{HCl\left(pư\right)}=n_{KOH}=0,3\left(mol\right)\)

Mà: HCl dư 15%

\(\Rightarrow n_{HCl}=0,3+0,3.15\%=0,345\left(mol\right)\)

\(\Rightarrow V_{ddHCl}=\dfrac{0,345}{1,5}=0,23\left(l\right)\)

b, Theo PT: \(n_{KCl}=n_{KOH}=0,3\left(mol\right)\)

\(\Rightarrow C_{M_{KCl}}=\dfrac{0,3}{0,15+0,23}\approx0,789\left(M\right)\)

\(C_{M_{HCl\left(dư\right)}}=\dfrac{0,3.15\%}{0,15+0,23}\approx0,118\left(M\right)\)

a, \(2KOH+MgSO_4\rightarrow K_2SO_4+Mg\left(OH\right)_2\)

b, Ta có: \(n_{KOH}=0,2.1=0,2\left(mol\right)\)

Theo PT: \(n_{MgSO_4}=n_{K_2SO_4}=n_{Mg\left(OH\right)_2}=\dfrac{1}{2}n_{KOH}=0,1\left(mol\right)\)

\(\Rightarrow m_{Mg\left(OH\right)_2}=0,1.58=5,8\left(g\right)\)

c, \(V_{MgSO_4}=\dfrac{0,1}{2}=0,05\left(l\right)\)

d, \(C_{M_{K_2SO_4}}=\dfrac{0,1}{0,2+0,05}=0,4\left(M\right)\)