Explanation

In an electrochemical cell, reduction occurs at the cathode (positive electrode), where electrons are gained by the oxidized species, causing it to be reduced.

Meanwhile, oxidation occurs at the anode (negative electrode), where electrons are lost by the reduced species, causing it to be oxidized.

Explanation

• Transition elements, also known as transition metals, are a group of elements in the d-block of the periodic table.
• They are characterized by their ability to form ions with different charges.
• They are often found in the middle of the periodic table.

Explanation

• When a saturated solution of KCl (potassium chloride) is heated, the solubility of KCl increases, allowing more KCl to dissolve in the solution.
• If the solution is heated to a temperature where all the KCl dissolves, it becomes a supersaturated solution.
• A supersaturated solution contains more dissolved solute than it can hold at a given temperature, making it unstable.

Explanation

• A triple covalent bond is a chemical bond that involves the sharing of three pairs of electrons between two atoms.
• This type of bond is typically found in molecules where three pairs of electrons are shared, resulting in a strong and stable bond.

Explanation

• A solution that contains a solid solute dissolved in a liquid solvent is called a solid-in-liquid solution or a solute-solvent solution.
• This is the most common type of solution, where a solid substance (the solute) is dissolved in a liquid substance (the solvent).

Explanation

• At room temperature, most ionic compounds are crystalline solids, meaning they have a rigid and orderly crystal structure.
• This is because the strong electrostatic forces between the oppositely charged ions hold them in a fixed position, creating a three-dimensional lattice.

Explanation

• Electronegativity is the ability of an atom to attract a shared pair of electrons in a covalent bond.
• It measures the ability of an atom to pull electrons towards itself.

Explanation

The equivalent weight of an element is the mass of the element that reacts with one mole of electrons (or one mole of hydrogen atoms).

For aluminum (Al), the equivalent weight is 9 g.

Atomic weight of Al = 27 g/mol

Valency of Al = 3 (since Al forms Al3+ ions)

Equivalent weight = Atomic weight / Valency

= 27 g/mol / 3

= 9 g

So, 1 g equivalent weight of Al is 9 g!

Explanation

• The empirical formula of hydrogen peroxide (H2O2) is HO.
• The empirical formula is the simplest whole-number ratio of atoms of each element in a compound.
• In this case, the ratio of hydrogen to oxygen is 1:1, which is represented by the formula HO.

Explanation

• A heterogeneous mixture is a mixture in which the components have different physical properties, such as color, texture, or phase (solid, liquid, or gas).
• In a heterogeneous mixture, the components are not uniformly distributed, and you can often see the individual components.