HALLA_BØL

What is the pH range of acids?

• 0 to 7

• 7 to 14

• -1 to 0

• 8 to 14

Define a base in terms of its properties.

• A base is a substance that only donates protons and has a pH less than 7.

• A base is a substance that cannot neutralize acids and has a pH of exactly 7.

• A base is a substance that accepts electrons but does not affect pH levels.

• A base is a substance that accepts protons or donates electron pairs, has a pH greater than 7, and can neutralize acids.

What is the chemical formula for hydrochloric acid?

• H2SO4

• HCl

• NaCl

• HNO3

Explain the concept of neutralization.

• Neutralization occurs when a base reacts with another base.

• Neutralization is the reaction between a metal and a non-metal.

• Neutralization is the reaction between an acid and a base to produce water and a salt.

• Neutralization is the process of mixing two acids together.

What is the role of indicators in acid-base reactions?

• Indicators play a crucial role in acid-base reactions by signaling pH changes through color changes.

• Indicators are used to increase the temperature of reactions.

• Indicators neutralize acids and bases during reactions.

• Indicators are substances that change state in acid-base reactions.

Name a common household item that is a base.

• table salt

• baking soda

• water

• vinegar

What happens when an acid reacts with a metal?

• An acid reacts with a metal to produce only oxygen gas.

• An acid reacts with a metal to form a base and water.

• An acid reacts with a metal to produce a salt and hydrogen gas.

• An acid reacts with a metal to create a solid metal compound.

Describe the difference between strong and weak acids.

• Strong acids are always more concentrated than weak acids.

• Weak acids do not conduct electricity in solution.

• Strong acids have a higher pH than weak acids.

• Strong acids fully dissociate in solution; weak acids partially dissociate.

What is the significance of the pH scale?

• The pH scale is significant for measuring acidity and alkalinity, impacting chemical reactions and biological processes.

• The pH scale indicates the weight of a solution.

• The pH scale is used to determine the color of substances.

• The pH scale measures temperature variations in solutions.

How do salts form from acid-base reactions?

• Salts are formed by mixing two acids together.

• Salts are created when a base reacts with another base.

• Salts result from the evaporation of water in acidic solutions.

• Salts form from the reaction of an acid and a base, producing water and an ionic compound.