Ω₁(МgSO₄) = 10%
ω₂(MgSO₄) = m(MgSO₄)/m(MgSO₄ p-p) = 35,1г/(100 г+ 35.1г)* 100% = 25,98% -- концентрация насыщенного раствора сульфата магния. значит дан ненасыщенный раствор.
Ответ:
Mg(II)S(II), Li(I)Cl(I), Si(IV)H(I)4, Cl(VII)2O(II)7, Zn(II)Cl(I)2, Cu(II)F(I)2, Ba(II)I(I)2, B(III)2O(II)3.
То, что в скобках, обычно пишут прямо над элементом
2HNO₃ + Cu(OH)₂ = Cu(NO₃)₂ + 2H₂O1)Cu²⁺ + 2OH⁻ + 2H⁺ + 2NO₃⁻ = Cu²⁺ +2NO₃⁻ + 2H₂0
2)OH⁻ + H⁺ = H₂<span>0
</span>
<span>AgNO</span>₃ + NaCl = NaNO₃ + AgCl↓ 1)Ag⁺ + NO₃⁻ + Na⁺ + Cl⁻ = Na⁺ + NO₃⁻ + AgCl↓ <span>2)Ag</span><span>⁺</span><span> </span><span>+</span><span> </span><span>Cl</span><span>⁻</span><span> </span><span>=</span><span> </span><span>Ag</span><span>Cl</span><span>↓</span><span>
</span>
Na₂SO₃ +
2H₂SO₄ = 2NaHSO₄ + SO₂↑ + H₂O
1)2Na⁺ +
SO₃²⁻ + 4H⁺ + 2SO₄²⁻ = 2Na⁺ + 2HSO₄⁻ + SO2↑ + H2O
<span>2)SO</span><span>₃</span><span>²</span><span>⁻</span><span> + 4H</span><span>⁺</span><span> + 2SO</span><span>₄</span><span>²</span><span>⁻</span><span> = 2HSO</span><span>₄</span><span>⁻</span><span> + SO</span>₂<span>↑ + H</span>₂<span>O</span>
2HCl + Zn = ZnCl2 + H2
BaO + 2HCl = BaCl2 + H2O
Cu(OH)2 + 2HCl = CuCl2 + 2H2O