20.) the following are the pH values for each item: cola-2; oragnjuice-3; beer-4
ID: 76620 • Letter: 2
Question
20.) the following are the pH values for each item: cola-2; oragnjuice-3; beer-4; coffee-5; human blood-7.4. Which of these liquidshas the HIGHEST molar concentration of OH-.A) cola
B) orange juice
C) beer
D) coffee
E) human blood
22.) Comparing the [H+] of orange juice and coffee; the[H+] of
A) orange juice is 10 times higher
B) orange juice is 100 times higher
C) orange juice is 1,000 times higher
D) coffee is two times higher
E) coffee is 100 times higher
21.) the ability of water molecules to form hydrogen bonds accountsfor water's
A) high specific heat
B) evaporate cooling
C) high heat of vaporization
D) cohesiveness and surface tension (i think it might be thisone)
E.) all of the above result from water's hydrogen bondingcapacity
Explanation / Answer
E) human blood has a pH ~ 7.4, so it has the highest pH (lowestconcentration of [H+] and hence highest [OH-]) Recall pH = -log[H+], so the higher the pH the lower the [H+]concentration and higher the [OH-] 22) orange juice has a pH of about 3.5, and the pH of coffee isabout 5.2 to 6.9 The pH difference is about 2, so that amounts to a 100 fold greater[H+] in orange juice answer is B) 21) all of the above are true
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