Chemical Concepts Flashcard for Grade 10

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water (H₂O) is 18 g/mol.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance.

Front

What is produced at the cathode during the electrolysis of water?

Back

Hydrogen gas is produced at the cathode during the electrolysis of water.

Front

What is the oxidation state of chlorine in KClO₃?

Back

The oxidation state of chlorine in KClO₃ is +5.

Front

What is the name of the ionic compound NaCl?

Back

The name of the ionic compound NaCl is Sodium chloride.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, ensure that the number of atoms of each element is the same on both sides of the equation.

Front

Balance the following chemical equation: C₂H₆ + O₂ → CO₂ + H₂O

Back

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O.

Front

What is the formula for calculating the number of moles?

Back

The formula for calculating the number of moles is: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is electrolysis?

Back

Electrolysis is a chemical process that uses electricity to break down compounds into their elements.

Front

What is the difference between an ionic and covalent bond?

Back

An ionic bond is formed by the transfer of electrons, while a covalent bond is formed by the sharing of electrons.