1: NaOH+HCl->NaCl+H2O

0,375        0,375

\(V_{HCl}=0.375\cdot22.4=8.4\left(lít\right)\)

\(C_{M\left(NaCl\right)}=\dfrac{0.375}{8.4+0.25}=\dfrac{15}{346}\)

\(n_{NaOH}=1,5.0,25=0,375\left(mol\right)\)

Pt : \(NaOH+HCl\rightarrow NaCl+H_2O\)

a) Theo Pt : \(n_{NaOH}=n_{HCl}=n_{NaCl}=0,375\left(mol\right)\)

\(V_{ddHCl}-\dfrac{0,375}{1,5}=0,25\left(l\right)\)

b) \(C_{MNaCl}=\dfrac{0,375}{0,25}=1,5\left(M\right)\)

 Chúc bạn học tốt 

\(a.n_{NaOH}=1,5.0,25=0,375mol\\ NaOH+HCl\rightarrow NaCl+H_2O\\ n_{NaOH}=n_{HCl}=n_{NaCl}=0,375mol\\ V_{HCl}=\dfrac{0,375}{1,5}=0,25l\\ b.C_{M\left(NaCl\right)}=\dfrac{0,375}{0,25+0,25}=0,75M\)

a, \(n_{NaOH}=0,2.1=0,2\left(mol\right)\)

\(m_{NaOH}=0,2.40=8\left(g\right)\)

b, \(n_{H_2SO_4}=2.0,1=0,2\left(mol\right)\)

\(c,C\%=\dfrac{6}{200}.100\%=3\%\)

\(m_{NaCl}=\dfrac{200.8}{100}=16\left(g\right)\)

\(n_{NaCl}=\dfrac{11,7}{58,5}=0,2\left(mol\right)\)

\(n_{NaNO_3}=\dfrac{100.8,5\%}{85}=0,1\left(mol\right)\)

\(V_{dd}=\dfrac{100}{1,25}=80\left(ml\right)\)

\(\left\{{}\begin{matrix}C_{M\left(NaCl\right)}=\dfrac{0,2}{0,08}=2,5M\\C_{M\left(NaNO_3\right)}=\dfrac{0,1}{0,08}=1,25M\end{matrix}\right.\)

Bài 1:

\(n_{KNO_3}=\dfrac{20}{101}=0,198\left(mol\right)\)

\(C_M=\dfrac{n}{V}=\dfrac{0,198}{0,85}=0,233M\)

Bài 2:

\(C_M=\dfrac{n}{V}=\dfrac{0,5}{0,75}=0,66M\)

Bài 3:

\(n_{KNO_3}=2.0,5=1\left(mol\right)\)

\(m_{KNO_3}=1.101=101\left(g\right)\)

Bài 4:

\(C\%=\dfrac{20}{600}.100=3,33\%\)

Bài 1:

\(n_{KNO_3}=\dfrac{20}{101}=0,198\left(mol\right)\)

\(C_{M_{ddKNO_3}}=\dfrac{0,198}{0,85}\approx0,23M\)

Bài 2:

\(C_{M_{ddKCl}}=\dfrac{0,5}{0,75}\approx0,667M\)

Bài 3:

\(n_{KNO_3}=0,5.2=1\left(mol\right)\Rightarrow m_{KNO_3}=1.101=101\left(g\right)\)

Bài 4:

\(C\%_{ddKCl}=\dfrac{20.100\%}{600}=3,333\%\)

1. Dung dịch CuSO₄ có nồng độ 0,5mol/lit là trong 1 lít dung dịch CuSO₄ thì chứa 0,5 mol CuSO₄

2. Dung  dịch đường có nồng độ 2 mol/lit cho biết trong 1 lít dung dịch đường thì chứa 2 mol đường

3. \(CM_{NaCl}=\dfrac{n}{V}=\dfrac{0,75}{4}=0,1875M\)

4. \(n_{NaOH}=\dfrac{16}{40}=0,4\left(mol\right)\\ CM_{NaOH}=\dfrac{0,4}{0,2}=2M\)

a, \(C_{M_{H_2SO_4}}=\dfrac{0,1}{0,25}=0,4\left(M\right)\)

b, \(n_{NaOH}=\dfrac{20}{40}=0,5\left(mol\right)\)

\(\Rightarrow C_{M_{NaOH}}=\dfrac{0,5}{0,4}=1,25\left(M\right)\)

\(a)C_{M\left(H_2SO_4\right)}=\dfrac{0,1}{0,25}=0,4M\\ b)C_{M\left(NaOH\right)}=\dfrac{\dfrac{20}{40}}{0,4}=1,25M\)

\(a,n_{H_2SO_4}=0,1mol\)

\(V_{H_2SO_4}=0,25l\left(250ml=0,25l\right)\\ C_{M_{H_2SO_4}}=\dfrac{n}{V}=\dfrac{0,1}{0,25}=0,4M\)

`b,` \(n_{NaOH}=\dfrac{m}{M}=\dfrac{20}{40}=0,5mol\)

\(V_{NaOH}=0,4l\left(400ml=0,4l\right)\)

\(C_{M_{NaOH}}=\dfrac{n}{V}=\dfrac{0,5}{0,4}=1,25M\)

\(n_{CuSO_4}=\dfrac{300}{160}=\dfrac{15}{8}\left(mol\right)\\ C_{MddCuSO_4}=\dfrac{\dfrac{15}{8}}{3}=0,625\left(M\right)\)