\(n_{CuO}=\dfrac{16}{80}=0.2\left(mol\right)\)
\(n_{H_2SO_4}=\dfrac{200.20\%}{98}=\dfrac{20}{49}\left(mol\right)\)
PT: \(H_2SO_4+CuO\rightarrow CuSO_4+H_2O\)
(ĐB) \(\dfrac{20}{49}\) \(0,2\)
(PƯ) \(0,2\) \(0,2\)
(SPƯ)\(\dfrac{51}{245}\) 0 \(0,2\)
\(\Rightarrow n_{CuSO_4}=0,2\left(mol\right)\)\(\Rightarrow m_{CuSO_4}=32\left(g\right)\)
b)Từ PT \(\Rightarrow n_{H_2SO_4dư}=\dfrac{51}{245}\left(mol\right)\)
\(\Rightarrow m_{H_2SO_4dư}=20,4\left(g\right)\)
\(m_{ddspu}=16+200=216\left(g\right)\)
\(\Rightarrow C\%_{H_2SO_4dư}=\dfrac{20,4}{216}.100\%\approx9,4\left(\%\right)\)
\(C\%_{CuSO_4}=\dfrac{32}{216}.100\%\approx14,84\left(\%\right)\)
Vậy...
a/ nCuO=16/60=0,2(mol)
mH2SO4=200.20%=40(g)
nH2SO4=40/98=0,4(mol)
PTHH: CuO+H2SO4-->CuSO4+H2O (1)
0,2 0,4 0,2 0,2 (mol)
có :0,2/1<0,4/1-->CuO hết,H2SO4 dư
--->nCuSO4=0,2(mol)
-->mCuSO4=0,2.160=32(g)
b/ từ pt(1)-->nH2O=0,2(mol)
khối lượng dd sau pư là
khối lượng dd sau pư là:16+200-0,2.18=212,4(g)
C%(CuSO4)=32/212,4.100%=15,06%
nhớ tích đúng nha
thêm phần b nha,xin lỗi bạn
nH2SO4(dư)=0,4-0,2=0,2(mol).
--->mH2SO4(dư)=0,2.98=19,6(g)
-->C%(H2SO4 dư)=19,6/212,4.100%=9,23%