Question

how do chemical buffers in blood maintain ph stability? 2 points by increasing metabolic rate by generating new molecules by neutralizing extreme acid/base concentrations by changing blood composition what makes water a critical indicator of potential life on other planets? 2 points its abundance in the universe its capacity for thermal regulation its role in chemical reactions its unique molecular properties why cant nonpolar lipids dissolve in water? * 2 points temperature variations waters ionic structure molecular weight differences differences in molecular polarity

Explanation:

• For the first question: Chemical buffers in blood work by neutralizing extreme acid/base concentrations. Buffers consist of a weak acid and its conjugate base (or vice - versa). When there is an excess of acid (\(H^{+}\)), the conjugate base of the buffer reacts with \(H^{+}\) to reduce its concentration. When there is an excess of base (e.g., \(OH^{-}\)), the weak acid of the buffer reacts with \(OH^{-}\) (e.g., \(H_{2}CO_{3}+OH^{-}\to HCO_{3}^{-}+H_{2}O\)).
• For the second question: Water's unique molecular properties (such as polarity, hydrogen bonding ability) make it a critical indicator of potential life on other planets. Polarity allows it to act as a universal solvent, hydrogen bonding gives it properties like high specific heat (thermal regulation), and it is involved in many biochemical reactions.
• For the third question: Non - polar lipids can't dissolve in water due to differences in molecular polarity. Water is a polar molecule (\(H_{2}O\) has a partial positive charge on hydrogen and partial negative charge on oxygen). Non - polar lipids have no (or very little) charge separation. According to the "like dissolves like" principle, polar solvents (water) dissolve polar or ionic substances, and non - polar solvents dissolve non - polar substances.

Answer:

• First question: By neutralizing extreme acid/base concentrations
• Second question: Its unique molecular properties
• Third question: Differences in molecular polarity