a) \(n_{KOH}=0,1.1=0,1\left(mol\right)\)

PTHH: 2KOH + H₂SO₄ → K₂SO₄ + 2H₂O

Mol:      0,1          0,1            0,1

b) \(V_{ddH_2SO_4}=\dfrac{0,1}{0,5}=0,2\left(l\right)\)

c) \(C_{M_{ddK_2SO_4}}=\dfrac{0,1}{0,1+0,2}=0,333M\)

a) 2NaOH + H₂SO₄→ Na₂SO₄ + 2H₂O 

b) n_NaOH = C_MNaOH . V= 1. 0,1= 0,1mol

PTHH:

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

     2             1                 1             2

   0,1         0.05            0,05         0,1

V_H2SO4 =  =0,1l

c) V_{dd sau phản ứng}  = 0,1+0,1=0,2l

C_M =  = 0,25M

\(a,PTHH:KOH+HCl\rightarrow KCl+H_2O\\ b,n_{KOH}=n_{HCl}=2\cdot0,1=0,2\left(mol\right)\\ \Rightarrow V_{dd_{HCl}}=\dfrac{0,2}{2}=0,1\left(l\right)\\ c,C_{M_{KCl}}=\dfrac{0,2}{0,1+0,1}=1M\)

Đổi 100ml = 0,1 lít

Ta có: \(n_{KOH}=2.0,1=0,2\left(mol\right)\)

a. PTHH: \(KOH+HCl--->KCl+H_2O\)

b. Theo PT: \(n_{HCl}=n_{KOH}=0,2\left(mol\right)\)

\(\Rightarrow V_{dd_{HCl}}=\dfrac{0,2}{2}=0,1\left(lít\right)=100\left(ml\right)\)

c. Ta có: \(V_{dd_{KCl}}=V_{dd_{HCl}}=0,1\left(lít\right)\)

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

\(\Rightarrow C_{M_{KCl}}=\dfrac{0,2}{0,1}=2M\)

\(n_{H_2SO_4}=0,4\cdot1=0,4mol\)

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+H_2O\)

 0,8              0,4

\(V_{NaOH}=\dfrac{0,8}{0,5}=1,6l\)

\(n_{H_2SO_4}=0.4\cdot1=0.4\left(mol\right)\)

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)

\(0.8.............0.4..............0.4\)

\(V_{dd_{NaOH}}=\dfrac{0.8}{0.5}=1.6\left(l\right)\)

\(V_{dd}=0.4+1.6=2\left(l\right)\)

\(C_{M_{Na_2SO_4}}=\dfrac{0.4}{2}=0.2\left(M\right)\)

300ml = 0,3l

\(n_{HNO3}=1.0,3=0,3\left(mol\right)\)

Pt : \(NaOH+HNO_3\rightarrow NaNO_3+H_2O|\)

          1               1               1              1

         0,3            0,3            0,3

\(n_{NaOH}=\dfrac{0,3.1}{1}=0,3\left(mol\right)\)

200ml = 0,2l

\(C_{M_{NaOH}}=\dfrac{0,3}{0,2}=1,5\left(M\right)\)

\(n_{NaNO3}=\dfrac{0,3.1}{1}=0,3\left(mol\right)\)

⇒ \(m_{NaNO3}=0,3.85=25,5\left(g\right)\)

Sau phản ứng :

\(V_{dd}=0,2+0,3=0,5\left(l\right)\)

\(C_{M_{NaNO3}}=\dfrac{0,3}{0,5}=0,6\left(M\right)\)

 Chúc bạn học tốt

\(n_{HNO_3}=0,3\left(mol\right)\)

\(NaOH+HNO_3\rightarrow NaNO_3+H_2O\)

Theo PT: \(n_{NaOH}=n_{NaNO_3}=n_{HNO_3}=0,3\left(mol\right)\)

\(\Rightarrow CM_{NaOH}=\dfrac{0,3}{0,2}=1,5M\)

\(m_{NaNO_3}=0,3.85=25,5\left(g\right)\)

a) nNaOH= 0,15(mol) ; nH3PO4= 0,1(mol)

Ta có: 1< 0,15/0,1 <2

=> Sản phẩm thu được là hỗn hợp 2 muối: NaH2PO4 và Na2HPO4

a) PTHH: NaOH + H3PO4 -> NaH2PO4 + H2O

x____________x__________x(mol)

2 NaOH + H3PO4 -> Na2HPO4 + 2 H2O

y_______0,5y_________0,5y(mol)

b) Ta có hpt:

\(\left\{{}\begin{matrix}x+y=0,15\\x+0,5y=0,1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,05\\y=0,1\end{matrix}\right.\)

=> m(muối)=mNaH2PO4 + mNa2HPO4= 120.0,05+142.0,1.0,5=13,1(g)

c) Vddmuoi= VddNaOH+ VddH3PO4= 0,1+0,1=0,2(l)

=> CMddNaH2PO4= 0,05/0,2=0,25(M)

CMddNa2HPO4=(0,1.0,5)/0,2=0,25(M)

a) $2NaOH + Cl_2 \to NaCl + NaCl + H_2O$

b) $n_{Cl_2} = \dfrac{6,5}{22,4} = 0,29(mol)$

$n_{NaOH} = 2n_{Cl_2} = 0,58(mol)$

$V_{dd\ NaOH} = \dfrac{0,58}{1} = 0,58(lít)$

$n_{NaCl} = n_{NaClO} = n_{Cl_2} = 0,29(mol)$
$C_{M_{NaCl}} = C_{M_{NaClO}} = \dfrac{0,29}{0,58} = 0,5M$

\(n_{NaOH}=1.0,4=0,4(mol);n_{FeCl_3}=1.0,1=0,1(mol)\\ a,PTHH:3NaOH+FeCl_3\to Fe(OH)_3\downarrow+3NaCl\\ \text {Vì }\dfrac{n_{NaOH}}{3}>\dfrac{n_{FeCl_3}}{1} \text {nên }NaOH\text { dư}\\ \Rightarrow n_{Fe(OH)_3}=0,1(mol)\\ \Rightarrow m_{Fe(OH)_3}=107.0,1=10,7(g)\\ b,n_{NaCl}=3n_{FeCl_3}=0,3(mol)\\ \Rightarrow C_{M_{NaCl}}=\dfrac{0,3}{0,4+0,1}=0,6M\)

a) Đổi 300 ml = 0,3 l

Cm=\(\dfrac{n}{v}\) \(\Rightarrow\) n_NaOH= Cm.V = 0,3.1 = 0,3 Mol

PTHH: 2NaOH + FeCl₂ \(\rightarrow\) 2NaCl + Fe(OH)₂

\(\Rightarrow\) n_Fe = 0,3 Mol

\(\Rightarrow\) V_Fe = \(\dfrac{n}{Cm}\) = \(\dfrac{0,3}{0,1}\) = 3 lít

b) ta có n_{\(_{Fe\left(OH\right)_2}\)}= 0,3 Mol

\(\Rightarrow\) m_{\(_{Fe\left(OH\right)_2}\)}= n.M = 0,3.90 = 27 g

c) mk nghĩ phải cho V_NaCl mới giải đc

V = 300 ml = 0,3 (l)

=>n_NaOH = 0,3.1 = 0,3 mol

2NaOH + FeCl₂ ->2 NaCl + Fe(OH)₂

0,3------>0,15---->0,3--------0,15

a) V_FeCl2 = \(\dfrac{0,15}{0,1}\)= 1,5 (l)

b) m_Fe(OH)2 = 0,15 . 90 = 13,5 g

c) Vdd = 1,5+ 0,3 = 1,8 (l)

C_M(NaCl) = \(\dfrac{0,3}{1,8}\) = 0,1666 M

ⁿNaOH =0,3

FeCl₂ + 2NaOH \(\rightarrow\) Fe(OH)₂ + 2NaCl

0,15 \(\leftarrow\) 0,3 \(\rightarrow0,15\rightarrow\)0,3

a,

^VFeCl₂ = 3(l)

b

^mFe(OH)₂ = 0,15 x 90 =13.5

c,

^CM_NaCl = 1M