Question

question 4
1.75 pts
adding hydroxyl oxide (oh⁻) to a solution would make the solutions ph more ________.

• alkalotic
• acidic

question 5
1.75 pts
by lowering the energy of activation, _______ facilitate chemical reactions

• proteins
• enzymes
• lipids

question 6
1.75 pts
co₂ is ________.

Explanation:

Question 4

Hydroxyl ions ($OH^-$) are basic. Adding a base increases the solution's basicity (alkalinity), so pH becomes more alkalotic. The option "acidic" is incorrect as acids increase $H^+$ and lower pH.

Enzymes are biological catalysts that lower the activation energy of reactions to speed them up. Proteins have various roles but not all are catalysts, and lipids are for energy storage/structure, not catalysis.

Carbon dioxide ($CO_2$) is a gaseous compound. It is also an acidic oxide as it reacts with water to form carbonic acid ($H_2CO_3$). In biological systems, it is a waste product of cellular respiration.

Answer:

A. alkalotic

Question 5