Solutions, pg1

What is a solution?

• A solid substance

• A mixture of two substances

• A type of gas

• A chemical reaction

Answer explanation

A solution is defined as a mixture of two or more substances where one substance is dissolved in another. This distinguishes it from a solid substance, a type of gas, or a chemical reaction.

What is the solute in a salt solution?

• Chlorine

• Sugar

• Water

• Salt

Answer explanation

In a salt solution, the solute is the substance that is dissolved. Since salt (sodium chloride) is the substance being dissolved in water, it is the correct answer.

What is the solvent in a sugar solution?

• Sugar

• Water

• Salt

• Chlorine

Answer explanation

In a sugar solution, water acts as the solvent, dissolving the sugar. Sugar is the solute, while salt and chlorine are not involved in this solution.

What taste does seawater have?

• Salty

• Sour

• Bitter

• Sweet

Answer explanation

Seawater has a distinct salty taste due to the high concentration of dissolved salts, primarily sodium chloride. This characteristic makes 'salty' the correct choice among the options provided.

What chemical is commonly found in swimming pool water?

• Sugar

• Salt

• Vinegar

• Chlorine

Answer explanation

Chlorine is commonly used in swimming pools to disinfect the water and kill harmful bacteria. It helps maintain water clarity and safety, making it the correct choice among the options provided.

What happens to salt when it is dissolved in water?

• It changes color

• It becomes visible

• It disappears

• It sinks to the bottom

Answer explanation

When salt dissolves in water, it breaks into its constituent ions, making it no longer visible as solid particles. This process is why it appears to 'disappear' in the solution, even though the salt is still present in ionic form.

What is the mass of a solution made from 10g of solute and 100g of solvent?

• 110g

• 90g

• 120g

• 100g

Answer explanation

The mass of a solution is the sum of the mass of the solute and the mass of the solvent. Here, 10g (solute) + 100g (solvent) equals 110g. Therefore, the correct answer is 110g.

Which of the following can be a solute?

• Gases, liquids, or solids

• Only gases

• Only liquids

• Only solids

Answer explanation

A solute can be a substance that dissolves in a solvent, and this includes gases, liquids, and solids. Therefore, the correct choice is 'Gases, liquids, or solids'.

What is the term for the process of a solute disappearing in a solvent?

• Dissolving

• Evaporation

• Condensation

• Filtration

Answer explanation

The process of a solute disappearing in a solvent is called dissolving. During this process, the solute particles are surrounded by solvent molecules, leading to a homogeneous solution. Other options like evaporation and filtration are unrelated.

What type of mixture is a solution?

• Heterogeneous

• Homogeneous

• Colloidal

• Suspension

Answer explanation

A solution is a homogeneous mixture where the components are evenly distributed at the molecular level, making it uniform throughout. This distinguishes it from heterogeneous mixtures, which have visibly different components.