\(a)Zn+2HCl\rightarrow ZnCl_2+H_2\\ b)n_{Zn}=\dfrac{6,5}{65}=0,1mol\\ Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,1      0,2             0,1             0,1

\(m_{ZnCl_2}=0,1.136=13,6g\\ c)V_{H_2}=0,1.24,79=2,479l\\ d)C_{\%HCl}=\dfrac{0,2.36,5}{200}\cdot100\%=3,65\%\)

1:

a) \(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right)\)

PTHH: \(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\uparrow\)

______0,2------>0,2------------------->0,2_____(mol)

=> \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

b) \(V_{ddH_2SO_4}=\dfrac{0,2}{1}=0,2\left(l\right)\)

2:

a) 

\(n_{HCl}=2.0,2=0,4\left(mol\right)\)

PTHH: \(Mg+2HCl\rightarrow MgCl_2+H_2\uparrow\)

______0,2<------0,4------------------>0,2______(mol)

=> \(m_{Mg}=0,2.24=4,8\left(g\right)\)

b) \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

a)

$M + 2HCl \to MCl_2 + H_2$
$n_{HCl} = 0,3.1 = 0,3(mol)$

Theo PTHH : $n_M = \dfrac{1}{2}n_{HCl} = 0,15(mol)$

$\Rightarrow M = \dfrac{3,6}{0,15} = 24(Mg)$

b)

$n_{MgCl_2} = n_{Mg} = 0,15(mol)$
$m_{MgCl_2} = 0,15.95 = 14,25(gam)$

c) $n_{H_2} = n_{Mg} = 0,15(mol)$
$V_{H_2} = 0,15.22,4 = 3,36(lít)$

Zn +2HCl----->ZmCl2 +H2

a) Ta có

n\(_{Zn}=\frac{6,5}{65}=0,1\left(mol\right)\)

Theo pthh

n\(_{H2}=n_{Zn}=0,1\left(mol\right)\)

V\(_{H2}=0,1.22,4=2,24\left(l\right)\)

b) Theo pthh

n\(_{HCl}=2n_{Zn}=0,2\left(mol\right)\)

m\(_{HCl}=0,2.36,5=7,3\left(g\right)\)

mdd=\(\frac{7,3.100}{7,3}=100\left(g\right)\)

c) Theo pthh

n\(_{ZnCl2}=n_{Zn}0,1mol\)

mdd =100+6,5-0,2=106,3(g)

C%=\(\frac{0,1.136}{106,3}.100\%=12,97\%\)

Chúc bạn học tốt

Zn + 2HCl ➝ ZnCl₂ + H₂↑

0,1 0,1 (mol)

a, n_Zn= \(\frac{m_{Zn}}{M_{Zn}}=\frac{6,5}{65}=0,1\left(mol\right)\)

The đầu bài ta có n_H2=0,1 mol

⇒ V_H2= n . 22,4 =2,24 (l)

ZN+2HCL-->ZNCL2+H2
0.1--------------------------->0.1
a. nZN=6.5/65=0.1mol
VH2=0.1×22.4=2.24l
b. theo pthh nHCL=0.2 mol
mHCL=0.2×36.5=7.3g
mddHCL=7.3÷7.3%=100g
c. muối thu được là ZNCL2
Theo pthh nZNCL2=0.1 mol
mZNCL2=0.1×136=13.6g
mddspu=13.6+100-0.2=113.4g
C%ZNCL2=13.6/113.4×100%~12%

\(n_{Zn}=\dfrac{3,9}{65}=0,06mol\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)

0,06    0,12       0,06        0,06

\(V_{H_2}=0,06\cdot22,4=1,344l\)

\(d_{H_2}\)_/CO2=\(\dfrac{M_{H_2}}{M_{CO_2}}=\dfrac{2}{44}=\dfrac{1}{22}\)

\(m_{HCl}=0,12\cdot36,5=4,38g\)

\(m_{ZnCl_2}=0,06\cdot136=8,16g\)

a) Zn + 2HCl ---> ZnCl2 + H2
b) nZn = 3,9:65= 0,06 ( mol) 
 theo pt , nH2 =nZn= 0,06 (mol) 
=> VH2(ĐKTC) = 0,06.22,4=1,344(l)
H2/CO2 = MH2/MCO2 =2/44=1/22 
c) theo pt nHCl = 2nZn = 2.0,06=0,12(mol)
=> mHCl= 0,12 . 36,5=4,38(g) 
d) theo pt , nZnCl2= nZn = 0,06(mol) 

=> m ZnCl2 = 0,06.136=8,16 (g)

a) $n_{CaCO_3} = 0,15(mol)$
$CaCO_3 + 2HCl \to CaCl_2 + CO_2 + H_2O$
$n_{HCl} = 2n_{CaCO_3} = 0,3(mol)$
$m_{dd\ HCl} = \dfrac{0,3.36,5}{7,3\%} = 150(gam)$

b)

$n_{CaCl_2} = n_{CO_2} = n_{CaCO_3} =0,15(mol)$
$V_{CO_2} = 0,15.22,4 = 3,36(lít)$
c)

$m_{dd} = 15 + 150 - 0,15.44 = 158,4(gam)$

$C\%_{CaCl_2} = \dfrac{0,15.111}{158,4}.100\% = 10,51\%$

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(n_{Al}=\dfrac{3,375}{27}=0,125\)

\(\Rightarrow n_{H_2}=\dfrac{0,125}{2}.3=0,1875mol\)      \(\Rightarrow V_{H_2}=0,1875.22,4=4,2l\)

\(n_{AlCl_3}=n_{Al}=0,125mol\)       \(\Rightarrow m_{AlCl_3}=0,125.133,5=16,6875g\)

a/ PTHH:2Al + 6HCl ===> 2AlCl3 + 3H2

n_Al = 5,4 / 27 = 0,2 mol

=> n_H2 = 0,3 mol

=> m_H2 = 0,3 x 2 = 0,6 gam

=> V_H2(đktc) = 0,3 x 22,4 = 6,72 lít

b/ => n_AlCl3 = 0,3 mol

=> m_AlCl3 = 0,2 x 133,5 = 26,7 gam

muối nhôm clorua là AlCl₃

a)

\(n_{Al}=0,2\left(mol\right)\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

\(V_{H_2}=6,72\) ( lít )

\(m_{H_2}=0,6\left(g\right)\)

a) 

\(n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

PTHH: Mg + 2HCl --> MgCl₂ + H₂

_____0,1<---0,2<-------0,1<---0,1

=> m_HCl = 0,2.36,5 = 7,3 (g)

=> \(m_{ddHCl}=\dfrac{7,3.100}{7,3}=100\left(g\right)\)

m_{dd sau pư} = 0,1.24 + 100 - 0,1.2 = 102,2 (g)

\(C\%\left(MgCl_2\right)=\dfrac{0,1.95}{102,2}.100\%=9,2955\%\)

b)

CTHH: A_aO_b

PTHH: \(A_aO_b+2bHCl->aACl_{\dfrac{2b}{a}}+bH_2O\)

____________0,2------->\(\dfrac{0,1a}{b}\)

=> \(\dfrac{0,1a}{b}\left(M_A+35,5.\dfrac{2b}{a}\right)=13,5\)

=> \(M_A=\dfrac{64b}{a}=\dfrac{2b}{a}.32\)

Nếu \(\dfrac{2b}{a}=1\) => M_A = 32 (L)

Nếu \(\dfrac{2b}{a}=2\) => M_A = 64(Cu)