\(n_{HCl}=\dfrac{7,3}{36,5}=0,2\left(mol\right)\)

PTHH: Zn + 2HCl --> ZnCl₂ + H₂

          0,1<---0,2------>0,1--->0,1

=> m_Zn = 0,1.65 = 6,5(g)

=> V_H2 = 0,1.22,4 = 2,24(l)

=> m_ZnCl2 = 0,1.136 = 13,6(g)

\(n_{HCl}=\dfrac{7.3}{36.5}=0.2\left(mol\right)\)

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

\(0.1........0.2........0.1..........0.1\)

\(m_{Zn}=0.1\cdot65=6.5\left(g\right)\)

\(m_{ZnCl_2}=0.1\cdot136=13.6\left(g\right)\)

\(V_{H_2}=0.1\cdot22.4=2.24\left(l\right)\)

Zn + 2HCl \(\rightarrow\) ZnCl₂ + H₂

\(n_{HCl}=\dfrac{7,3}{36,5}=0,2mol\)

\(\Rightarrow n_{Zn}=\dfrac{0,2}{2}=0,1mol\\ m_{Zn}=0,1.65=6,5g\)

\(\Rightarrow n_{H_2}=\dfrac{0,2}{2}=0,1mol\\ V_{H_2}=0,1.22,4=2,24l\)

\(\Rightarrow n_{ZnCl_2}=\dfrac{0,2}{2}=0,1mol\\ m_{ZnCl_2}=0,1.\left(65+35,5.2\right)=13,6g\)

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

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

a, n_H2 = n_Zn = 0,2 (mol)

⇒ V_H2 = 0,2.24,79 = 4,958 (l)

b, n_ZnCl2 = n_Zn = 0,2 (mol)

⇒ m_ZnCl2 = 0,2.136 = 27,2 (g)

c, \(H=\dfrac{3,225}{4,958}.100\%\approx65,05\%\)

Zn+2HCl->ZnCl2+H2

0,5----1------0,5-----0,5

n Zn=0,5 mol

=>VH2=0,5.24,79=12,395l

=>m ZnCl2=0,5.136=68g

CuO+H2-to->Cu+H2O

0,5----0,5-------------0,5

=>m Cu=0,5.64=32g

a)

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

b)

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

Theo PT:\(n_{H_2}=n_{Zn}=0,2mol\)

\(\Rightarrow V_{H_2}=0,2.24,79=4,958l\)

a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

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

Theo PT: \(n_{H_2}=n_{Zn}=0,2\left(mol\right)\)

\(\Rightarrow V_{H_2}=0,2.24,79=4,958\left(l\right)\)

$a)$

PTHH : $Zn+2HCl\to ZnC{l}_2+H_2\uparrow$

$b)$

$n_{Zn}=\frac{13}{65}=0,2$ $mol$

Theo phương trình : $n_{H_2}=n_{Zn}=0,2$ $mol$

$\Rightarrow V_{H_2}=0,2.24,79=4,958$ $l$

$PTHH:Zn+2HCl\to ZnCl_2+H_2\uparrow$

Câu 1:

a, Zinc + Hydrochloric acid → Zinc chloride + Hydrogen

b, Theo ĐLBT KL, có: m_Zn + m_HCl = m_ZnCl2 + m_H2

⇒ m_HCl = 40,8 + 0,6 - 19,5 = 21,9 (g)

Bài 2:

a, Dấu hiệu: Có chất mới xuất hiện (ZnCl₂ và H₂)

b, PT: Iron + Hydrochloric acid → Iron (II) chloride +  hydrogen

c, Theo ĐLBT KL: m_Fe + m_HCl = m_FeCl2 + m_H2

⇒ m_H2 = 5,6 + 7,3 - 12,7 = 0,2 (g)

Bài 3:

a, PT: Magnesium + Oxygen →  Magnesium oxide 

b, m_Mg + m_O2 = m_MgO

c, Từ phần b, có: m_O2 = 15 - 9 = 6 (g)

Bạn tham khảo nhé!

Câu 1:

a, Zinc + Hydrochloric acid → Zinc chloride + Hydrogen

b, Theo ĐLBT KL, có: m_Zn + m_HCl = m_ZnCl2 + m_H2

⇒ m_HCl = 40,8 + 0,6 - 19,5 = 21,9 (g)

Bài 2:

a, Dấu hiệu: Có chất mới xuất hiện (ZnCl₂ và H₂)

b, PT: Iron + Hydrochloric acid → Iron (II) chloride +  hydrogen

c, Theo ĐLBT KL: m_Fe + m_HCl = m_FeCl2 + m_H2

⇒ m_H2 = 5,6 + 7,3 - 12,7 = 0,2 (g)

Bài 3:

a, PT: Magnesium + Oxygen →  Magnesium oxide 

b, m_Mg + m_O2 = m_MgO

c, Từ phần b, có: m_O2 = 15 - 9 = 6 (g)

a, Kẽm + Hydrochloric acid \(\rightarrow\) Kẽm Chloride + khí Hydrogen

b. Theo ĐLBTKL, ta có:

\(m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\\ \Rightarrow m_{ZnCl_2}=6,5+7,3-0,2=13,6g\)

d, PTHH: Zn + 2HCl\(\rightarrow\) ZnCl₂ + H₂

\(a,PTHH:Zn+HCl\rightarrow ZnCl_2+H_2\)

\(b,Áp.dụng.ĐLBTKL,ta.có:\)

\(m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\\ m_{H_2}=m_{Zn}+m_{HCl}-m_{ZnCl_2}=9,75+10,95-20,4=0,3\left(g\right)\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05\left(mol\right)\)

PTHH: Zn + 2HCl ---> ZnCl₂ + H₂

         0,05-->0,1------>0,05--->0,05

         FeO + H₂ --t^o--> Fe + H₂O

                  0,05------>0,05

=> \(\left\{{}\begin{matrix}m_{ZnCl_2}=0,05.136=6,8\left(g\right)\\V_{H_2}=0,05.24,79=1,2395\left(l\right)\\m_{Fe}=0,05.56=2,8\left(g\right)\end{matrix}\right.\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05\left(mol\right)\\ pthh:Zn+2HCl\rightarrow ZnCl_2+H_2\) 
          0,05                  0,05       0,05 
\(m_{ZnCl_2}=0,05.136=6,8\left(g\right)\\ V_{H_2}=0,05.24,79=1,2395l\) 
\(FeO+H_2\underrightarrow{t^o}Fe+H_2O\) 
 0,05   0,05   0,05 
\(m_{Fe}=0,05.56=2,8g\)