\(n_{Zn}=\dfrac{6,5}{65}=0,1\left(mol\right);n_{HCl}=0,5.1=0,5\left(mol\right)\\ PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\\ Vì:\dfrac{0,5}{2}>\dfrac{0,1}{1}\Rightarrow Zn.hết,HCldư\\ n_{HCl\left(dư\right)}=0,5-2.0,1=0,3\left(mol\right)\\ m_{HCl\left(dư\right)}=0,3.36,5=10,95\left(g\right)\)

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

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

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

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

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

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

PT: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

___0,3____0,6_____0,3____0,3 (mol)

a, \(m_{Zn}=0,3.65=19,5\left(g\right)\)

b, \(m_{HCl}=0,6.36,5=21,9\left(g\right)\)

c, \(m_{ZnCl_2}=0,3.136=40,8\left(g\right)\)

Bạn tham khảo nhé!

Zn+2HCl->ZnCl₂+H₂

0,3---0,6-----0,3----0,3 mol

=>m _Zn=0,3.65=19,5g

=>m _HCl=0,6.35,6=21,9g

=>m _ZnCl2=0,3.136=40,8g

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

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)

\(n_{Zn}=\dfrac{0,65}{65}=0,01\left(mol\right)\\ n_{H_2}=n_{Zn}=0,01\left(mol\right)\\ V_{H_2\left(25^oC,1bar\right)}=24,79.0,01=0,2479\left(l\right)\)

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 : $n_{H_2}=n_{Zn}=0,2$ $mol$

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

\(n_{Fe}=\dfrac{11,2}{56}=0,2mol\\ n_{HCl}=0,2.2,5=0,5mol\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ \Rightarrow\dfrac{0,2}{1}>\dfrac{0,5}{2}\Rightarrow HCl.dư\\ n_{HCl,pư}=0,2.2=0,4mol\\ m_{HCl,dư}=\left(0,5-0,4\right).36,5=3,65g\)

\(a)\) Theo định luật bảo toàn khối lượng:

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