Question

Выберите вещества ,которые диссоциируют в водных растворах : -хлорид магния -гидроксид магния -сульфат бария -бромид калия -фторид кальция -сульфат меди(II) -азотная кислота -хлорид серебра(I) -сульфид цинка -гидроксид лития Укажите тип химической связи в выбранных веществах и составьте соответствующие уравнения электролит. диссоциации(необяз.,но за это поставлю спасибо вашему аккаунту.)

Answer 1

Хлорид магния = Mg+Cl2
бромид калия = K + Br
сульфат меди 2 = Cu + SO4
азотная кислота = H + NO3
хлорид серебра = Ag + Cl
гидроксид лития = Li + OH

Answer 2

Dissociation of Substances in Aqueous Solutions

The substances that dissociate in aqueous solutions are as follows:

- Magnesium chloride (MgCl2): Magnesium chloride dissociates into magnesium ions (Mg2+) and chloride ions (Cl-) in water. - Magnesium hydroxide (Mg(OH)2): Magnesium hydroxide dissociates into magnesium ions (Mg2+) and hydroxide ions (OH-) in water. - Barium sulfate (BaSO4): Barium sulfate is insoluble in water and does not dissociate into ions. - Potassium bromide (KBr): Potassium bromide dissociates into potassium ions (K+) and bromide ions (Br-) in water. - Calcium fluoride (CaF2): Calcium fluoride is sparingly soluble in water and does not dissociate significantly into ions. - Copper(II) sulfate (CuSO4): Copper(II) sulfate dissociates into copper ions (Cu2+) and sulfate ions (SO42-) in water. - Nitric acid (HNO3): Nitric acid dissociates into hydrogen ions (H+) and nitrate ions (NO3-) in water. - Silver chloride (AgCl): Silver chloride is sparingly soluble in water and dissociates into silver ions (Ag+) and chloride ions (Cl-) to a small extent. - Zinc sulfide (ZnS): Zinc sulfide is insoluble in water and does not dissociate into ions. - Lithium hydroxide (LiOH): Lithium hydroxide dissociates into lithium ions (Li+) and hydroxide ions (OH-) in water.

Types of Chemical Bonds and Electrolytic Dissociation Equations

The types of chemical bonds present in the selected substances are as follows:

- Ionic Bond: Magnesium chloride (MgCl2), potassium bromide (KBr), copper(II) sulfate (CuSO4), nitric acid (HNO3), silver chloride (AgCl), and lithium hydroxide (LiOH) have ionic bonds. - Covalent Bond: Magnesium hydroxide (Mg(OH)2), barium sulfate (BaSO4), calcium fluoride (CaF2), zinc sulfide (ZnS) have covalent bonds.

The corresponding electrolytic dissociation equations for the substances with ionic bonds are as follows:

- Magnesium chloride (MgCl2): MgCl2 → Mg2+ + 2Cl-. - Potassium bromide (KBr): KBr → K+ + Br-. - Copper(II) sulfate (CuSO4): CuSO4 → Cu2+ + SO42-. - Nitric acid (HNO3): HNO3 → H+ + NO3-. - Silver chloride (AgCl): AgCl → Ag+ + Cl-. - Lithium hydroxide (LiOH): LiOH → Li+ + OH-.

Please note that barium sulfate (BaSO4), calcium fluoride (CaF2), and zinc sulfide (ZnS) do not undergo significant electrolytic dissociation in water due to their low solubility or insolubility.

I hope this helps! Let me know if you have any further questions.