Question

[ngân]

 Các bạn giúp mình hoàn thiện 2 bảng naày với. Nhanh hộ minhf nha, mình đang cần gấp

Answer 1

[Nguyễn Hoàng Minh]

	\(NaCl\)	\(Ca\left(OH\right)_2\)	\(BaCl_2\)	\(KOH\)	\(CuSO_4\)
\(m_{CT}\)	\(30g\)	\(0,148g\)	\(\dfrac{150\cdot20\%}{100\%}=30\left(g\right)\)	\(42g\)	\(3g\)
\(m_{H_2O}\)	\(170g\)	\(199,852g\)	\(120g\)	\(270g\)	\(17g\)
\(m_{dd}\)	\(200g\)	\(\dfrac{0,148\cdot100\%}{0,074\%}=200\left(g\right)\)	\(150g\)	\(312g\)	\(\dfrac{3\cdot100\%}{15\%}=20\left(g\right)\)
\(C\%\)	\(\dfrac{30}{200}\cdot100\%=15\%\)	\(0,074\%\)	\(20\%\)	\(\dfrac{42}{312}\cdot100\%\approx13,46\%\)	\(15\%\)

Answer 2

[Nguyễn Hoàng Minh]

\(A\)	\(B\)	Trả lời
1/...	\(a,10\%\)	\(n_{HCl}=0,5\cdot2=1\left(mol\right)\Rightarrow B\)
2/...(sửa đề là \(m_{CT}\))	\(b,1mol\)	\(m_{CT_{H_2SO_4}}=\dfrac{250\cdot20\%}{100\%}=50\left(g\right)\Rightarrow C\)
3/...	\(c,50g\)	\(V_{dd_{NaOH}}=\dfrac{0,2}{1}=0,2\left(l\right)\Rightarrow D\)
4/...	\(d,0,2\text{ lít}\)	\(C\%=\dfrac{25}{250}\cdot100\%=10\%\Rightarrow A\)
	\(e,500ml\)