As the oxidation state of a metal increases, its electronegativity increases and the and the bonds become increasingly covalent. This makes SnCl2 form a network of solid where the atoms are bonded to one another through a network of polar covalent bonds.

Sncl2 is more stable than sncl4. According, to the rule more charge has higher tendency to polarise the surrounding atom which tends to introduce a covalent character in molecule. sncl4 tends to have higher positive charge and its size is smaller. Hence, sncl4 is covelant and sncl2 is iocnic and stable.

In solid state, crystalline of SnCl2, in fact, is sort of “linear” polymer, while SnCl4 is a molecular crystalline. To break the van der waals force between molecular lattice of SnCl4 needs much less energy than to break the Sn-Cl-Sn covalent bond. Hence SnCl2 has a high melting point than SnCl4.

And we know the melting and boiling point of ionic compounds are higher than covalent compounds. So in normal temperature SnCl2 is solid and SnCl4 is liquid.

In SnCl2,the tin is electrin deficient centre. Due to presence of two chlorine atoms the electron deficiencyagain increases. Hence erectron rich centre readily attacks to the electron deficient tin centre. Here sn centre acts as lewis acid.

stannous chloride

Tricopper phosphide

Potassium chloride

The ions from KCl derive from a strong acid (HCl) and a strong base (KOH). Therefore, neither ion will affect the acidity of the solution, so KCl is a neutral salt.

Potassium chloride (KCl)

It consists of a Potassium atom bonding with a Chloride atom. The Potassium chloride chemical formula is KCl. It is formed when the one excess electron in the valence shell of the Potassium atom is transferred to the valence shell of the Chlorine atom so that both the atoms complete their octet valency.

Potassium chloride (KCl) is a water-soluble compound that is generally used to prevent or treat severe potassium loss (Hypokalemia) or severe potassium loss of various etiologies. It is important to reduce the effects of KCl while prolonging its effect by using a suitable sustained release dosage form.

2: As potassium chloride (KCl) dissolves in water, the ions are hydrated. Ion-dipole forces attract the positive (hydrogen) end of the polar water molecules to the negative chloride ions at the surface of the solid, and they attract the negative (oxygen) ends to the positive potassium ions.

Potassium chloride (KCl, or potassium salt) is a metal halide salt composed of potassium and chlorine. It is odorless and has a white or colorless vitreous crystal appearance. The solid dissolves readily in water, and its solutions have a salt-like taste….Potassium chloride.

Names
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Properties
Chemical formula	KCl

The Cl atom will gain an electron and acquire a negative charge, so it’s going to become a negative ion with a charge of -1, written as Cl-. Potassium chloride is a salt consisting of a positive ion (K+) and negative ion (Cl-). Here, we can see that KCl consists of a positive ion (K+) and a negative ion (Cl-).

Water

Barium carbonate is an odorless white inorganic solid. It occurs in nature as the mineral witherite. It is soluble in water at 24 mg/L at 25 °C, soluble in acids (except sulfuric acid) and in ethanol.

All sodium, potassium, and ammonium salts are soluble in water. The chlorides, bromides, and iodides of all metals except lead, silver, and mercury(I) are soluble in water. HgI2 is insoluble in water. PbCl2, PbBr2, and PbI2 are soluble in hot water.

Lithium chloride

Names
Boiling point	1,382 °C (2,520 °F; 1,655 K)
Solubility in water	68.29 g/100 mL (0 °C) 74.48 g/100 mL (10 °C) 84.25 g/100 mL (25 °C) 88.7 g/100 mL (40 °C) 123.44 g/100 mL (100 °C)
Solubility	soluble in hydrazine, methylformamide, butanol, selenium(IV) oxychloride, propanol

Strontium sulfate (SrSO4) is the sulfate salt of strontium….Strontium sulfate.

Names
Solubility in water	0.0135 g/100 mL (25 °C) 0.014 g/100 mL (30 °C)
Solubility product (Ksp)	3.44 x 10−7
Solubility	insoluble in ethanol, alkalis slightly soluble in acids
Magnetic susceptibility (χ)	−57.9·10−6 cm3/mol

Barium chloride

Names
Solubility in water	31.2 g/100 mL (0 °C) 35.8 g/100 mL (20 °C) 59.4 g/100 mL (100 °C)
Solubility	soluble in methanol, insoluble in ethanol, ethyl acetate
Magnetic susceptibility (χ)	-72.6·10−6 cm3/mol
Structure

Solubility Rules -, ClO4 -, ClO3 -, and C2H3O2 – anions are SOLUBLE.

Write the reaction and identify the precipitate. Barium chloride and potassium sulfate are both ionic compounds. Because it is insoluble in water we know that it is the precipitate. As all of the other substances are soluble in water we can rewrite the equation.