Reactions that release energy are called __________ reactions.

Which of the following statements about a carbonated cola beverage with a pH of 2.9 is true?

a. It has a relatively high concentration of hydrogen ions.

b. It has a relatively low concentration of hydrogen ions.

c. It has equal amounts of hydroxyl and hydrogen ions.

d. Cola is a buffered solution.

In water, cations and anions of salts dissociate from one another and become surrounded by water molecules. In this state, the ions are also called __________ .

a. electrically negative

b. ionically bonded

c. electrolytes

d. hydrogen bonds

The __________ scale is a measure of the concentration of hydrogen ions in a solution.

Which of the following can be most accurately described as a decomposition reaction?

a. C₆H₁₂O₆ + 6 O₂ → 6 H₂O + 6 CO₂

b. glucose + ATP → glucose phosphate + ADP

c. 6 H₂O + 6 CO₂ → C₆H₁₂O₆ + 6 O₂

d. A + BC → AB + C

All chemical reactions begin with reactants and result in new molecules called __________ .

The reverse of dehydration synthesis is __________ .