pH Scale

What does the term Alkaline refer to?

• A term used to describe a substance or solution that is acidic, having a pH value less than 7.

• A term used to describe a substance or solution that is neutral, having a pH value of 7.

• A term used to describe a substance or solution that is basic, having a pH value greater than 7.

• A term used to describe a substance or solution that is volatile, having a pH value that fluctuates.

Hydroxide Ion (OH-)

• A positively charged ion produced by acids, which decreases the alkalinity of an aqueous solution.

• A negatively charged ion produced by bases, which increases the alkalinity or basicity of an aqueous solution.

• A neutral ion that does not affect the pH of a solution.

• A type of molecule that contains two hydrogen atoms and one oxygen atom.

Base Noun

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[beys]

• A compound that produces hydroxide ions (OH-) in a solution, resulting in a pH value greater than 7.

• A substance that donates protons (H+) in a solution, resulting in a pH value less than 7.

• A neutral substance that does not affect the pH of a solution.

• A compound that reacts with acids to form salts and water.

What is Phenolphthalein?

• A type of acid

• A chemical indicator that remains colorless in acidic and neutral solutions but turns a distinct magenta color in basic solutions.

• A common food preservative

• A synthetic dye used in textiles

Acid Noun

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[as-id]

• A compound that releases hydrogen ions (H+) in a solution, resulting in a pH value of less than 7.

• A substance that has a pH value of 7 or higher.

• A liquid that turns blue litmus paper red.

• A compound that neutralizes bases.

What does the term Logarithmic describe?

• A scale where each unit change represents a tenfold change in the quantity being measured, like the pH scale.

• A method of calculating the area of a circle.

• A type of graph that only shows linear relationships.

• A scale that measures temperature in Celsius.

What is Homeostasis?

• The process by which living organisms maintain a stable internal environment, such as a constant and balanced pH level.

• A method of communication between cells in the body.

• The ability of an organism to adapt to its environment over time.

• The process of breaking down food into energy.

Buffer

• A substance that resists sharp, sudden changes in pH by reacting with and neutralizing added strong acids or bases.

• A type of computer memory that temporarily holds data for quick access.

• A solution that increases the acidity of a liquid.

• A chemical that enhances the flavor of food.

What is the pH Scale?

• A logarithmic scale from 0 to 14 that measures the acidity or basicity of a substance based on hydrogen ion concentration.

• A scale that measures the temperature of a substance.

• A scale that indicates the density of liquids.

• A scale used to measure the color of a solution.

What is a pH Indicator?

• A chemical compound that visually changes color in response to pH changes, used to determine if a solution is acidic or basic.

• A device used to measure the temperature of a solution.

• A type of chemical that neutralizes acids and bases.

• A solution that remains colorless regardless of pH changes.