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

b)\(n_{H_2}=\frac{5,6}{22,4}=0,25\left(mol\right)\)

pt: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

   0,25 mol  0,5 mol   <---            0,25 mol

=>\(m_{Zn}=n_{Zn}.M_{Zn}=0,25.65=16,25\left(g\right)\)

c)\(V_{HCl}=\frac{n_{HCl}}{C_{M_{HCl}}}=\frac{0,5}{0,5}=1\)

a, Zn + 2HCL  →  ZnCl₂ + H₂ 

_{b, Số mol của hidro là : n = m/M = 5,6/ 22,4=0,25 mol}

Theo PTPU : số mol của kẽm là 0,25 mol =>    khối lượng kẽm tham gia phản ứng là m = n.M = 16,25 g

c,Theo PTPU : số mol của dung dịch HCl  là : 0,25 × 2=0,5 => thể tích dung dịch HCl là :  V= n/ CM = 0,5 / 0,5 = 1 lit́

Oxit:

 P₂O_{5: Điphotpho pentaoxit}

 MgO: magie oxit

Axit:

HCl: Axit clohidric

 H₂SO_{4: Axit sunfuric}

Bazơ:

Ca(OH)_{2: Canxi hidroxit}

Mg(OH)_{2: magie hidroxit}

Muối:

 CaSO_{4: canxi sunfat}

NaHCO_{3: natri hidrocacbonat}

\(n_{Zn}=\dfrac{13}{65}=0,2\left(mol\right);n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\a, Zn+2HCl\rightarrow ZnCl_2+H_2\\ b,V\text{ì}:\dfrac{0,2}{1}>\dfrac{0,1}{1}\Rightarrow Zn\text{dư}\\ \Rightarrow n_{Zn\left(p.\text{ứ}\right)}=n_{ZnCl_2}=n_{H_2}=0,1\left(mol\right)\\b, m_{Zn\left(p.\text{ứ}\right)}=0,1.65=6,5\left(g\right)\\ n_{HCl}=0,1.2=0,2\left(mol\right)\\ m_{HCl}=0,2.36,5=7,3\left(g\right)\\ d,m_{ZnCl_2}=136.0,1=13,6\left(g\right)\)

\(n_{H_2}=\dfrac{0.84}{22.4}=0.0375\left(mol\right)\)

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

\(.........0.075......0.0375\)

\(m_{HCl}=0.075\cdot36.5=2.7375\left(g\right)\)

PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)

Ta có: \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{H_2}=n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\\n_{HCl}=2n_{Fe}=0,4\left(mol\right)\end{matrix}\right.\)

a, Ta có: \(V_{H_2}=0,2.22,4=4,48\left(l\right)\)

b, \(V_{ddHCl}=\dfrac{0,4}{1,5}\approx0,267\left(l\right)\)

c, \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)

Bạn tham khảo nhé!

a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

b, \(n_{H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)

Theo PT: \(n_{Zn}=n_{H_2}=0,3\left(mol\right)\)

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

c, \(n_{HCl}=2n_{H_2}=0,6\left(mol\right)\)

\(\Rightarrow C_{M_{HCl}}=\dfrac{0,6}{0,1}=6\left(M\right)\)

\(a.Mg+2HCl\rightarrow MgCl_2+H_2\\ b.n_{H_2}=0,2\left(mol\right)\\ TheoPT:n_{Mg}=n_{H_2}=0,2\left(mol\right)\\ \Rightarrow m_{Mg}=0,2.24=4,8\left(g\right)\\ c.n_{HCl}=2n_{H_2}=0,4\left(mol\right)\\ \Rightarrow m_{HCl}=0,4.36,5=14,6\left(g\right)\)

\(n_{HCl}=0,25.2=0,5\left(mol\right)\\ a,PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\\ b,n_{Zn}=n_{H_2}=n_{ZnCl_2}=\dfrac{0,5}{2}=0,25\left(mol\right)\\ m_{Zn}=0,25.65=16,25\left(g\right)\\ c,V_{H_2\left(đktc\right)}=0,25.22,4=5,6\left(l\right)\)

Không biết đúng không nữa;-;;;

a) PTHH: Zn + 2HCl -> ZnCl2 + H2 

b) HCl=250ml=0,25l

n2HCl= V/22,4= 0,5/22,4= 0,02(mol)

Zn  +  2HCl -> ZnCl2  +  H2

1          2              1         1

0,01 <-0,5--------------> 0,01

mZn= n.M= 0,01.65= 0,65(gam)

c) VH2=n . 22,4= 0,01 . 22,4= 0,224(l)
 

a) 

Zn  +  2HCl  →  ZnCl₂   +  H₂ 

b) nZn = \(\dfrac{3,5}{65}\)=\(\dfrac{7}{130}\) mol 

Theo tỉ lệ phản ứng => nH₂ = nZn= \(\dfrac{7}{130}\)mol

<=> V H₂ = \(\dfrac{7}{130}\).22,4 = 1,206 lít

c) nZnCl₂ = nZn => mZnCl₂ = \(\dfrac{7}{130}\).136= 7,32 gam