Є декілька в класифікації солей:
За кислотою, якій відповідає ця сіль (хлориди, фосфати, нітрати)
За середовищем : Середні (нормальні) солі, Кислі солі, Основні солі
Солі за своїм складом поділяються на середні, кислі, основні та подвійні.
· середні (нормальні);
Утворюються при повному заміщенні атомів Гідрогену в молекулах кислот атомами металів. Наприклад, Na2CO3, BaCl2.
· кислі;
Утворюються при неповному заміщенні атомів Гідрогену в молекулах кислот атомами металів. Наприклад, NaHCO3, KH2PO4.
· основні;
Утворюються при неповному заміщенні гідроксильних груп в молекулах основ кислотними залишками. Наприклад, MgOHCl, BaOHBr.
· подвійні;
Утворюються при заміщенні атомів Гідрогену в молекулах кислот двома різними металами. Наприклад, KAlSO4, K2NaPO4.
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n(NaOH)=0,4 моль
Найти:
m(Cu(OH)2)=?
n(Cu(OH)2)=?
2NaOH + CuSO4 = Cu(OH)2 + Na2SO4
n(Cu(OH)2)=n(NaOH)/2=0.4/2=0.2 моль
M(Cu(OH)2)=98 г/моль
m(Cu(OH)2)=n(Cu(OH)2)*M(Cu(OH)2)=98*0.2=19.6 г.
Масса гидроксида меди (II) составляем 19.6 г, а количество моль 0.2
Объяснение: