Water, Acids, Bases, pH, chem reactions (23)

Front

What part of a water molecule has a positive charge?

Back

The Hydrogen.

Front

What is the role of enzymes in chemical reactions?

Back

Enzymes increase the rate of a reaction by lowering the activation energy barrier.

Front

In a solution of sweet tea, what is the solvent?

Back

Water.

Front

What are acids?

Back

Compounds that produce hydrogen (H+) ions when dissolved in water.

Front

What factors affect the action of enzymes on a substrate?

Back

pH and temperature.

Front

What is the pH scale?

Back

A scale that measures how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is a base?

Back

A substance that produces hydroxide (OH-) ions when dissolved in water.

Front

What is the difference between a solvent and a solute?

Back

A solvent is the substance that dissolves a solute; the solute is the substance that is dissolved.

Front

What is the significance of the hydrogen bond in water?

Back

Hydrogen bonds give water its unique properties, such as high surface tension and the ability to dissolve many substances.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat.