BIOL 1345

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Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

10(-4) M

Which of the following statements is true about buffer solutions?

They maintain a relatively constant pH when either acids or bases are added to them They maintain a relatively constant pH when either acids or bases are added to them.

Water's high specific heat is mainly a consequence of the:

absorption and release of heat when hydrogen bonds break and form

Pure, freshly-distilled water has a pH of 7. This means that:

the concentration of H+ ions in the water equals the concentration of OH- ions in the water.

Temperature usually increases when water condenses. Which behavior of water is most directly responsible for this phenomenon?

the release of heat by the formation of hydrogen bonds


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