Which statements are true? Explain why or why not.1 A 10–8 M solution of HCl has a pH of 8.2 Most of the interactions between macromoleculescould be mediated just as well by covalent bonds as bynoncovalent bonds.3 Animals and plants use oxidation to extract energyfrom food molecules.4 If an oxidation occurs in a reaction, it must beaccompanied by a reduction.5 Linking the energetically unfavorable reaction A→ B to a second, favorable reaction B → C will shift theequilibrium constant for the first reaction.6 The criterion for whether a reaction proceedsspontaneously is ΔG not ΔG°, because ΔG takes intoaccount the concentrations of the substrates and products.7 The oxygen consumed during the oxidation of glu-cose in animal cells is returned as CO2 to the atmosphere.
Which statements are true? Explain why or why not.
1 A 10–8 M solution of HCl has a pH of 8.
2 Most of the interactions between macromolecules
could be mediated just as well by covalent bonds as by
noncovalent bonds.
3 Animals and plants use oxidation to extract energy
from food molecules.
4 If an oxidation occurs in a reaction, it must be
accompanied by a reduction.
5 Linking the energetically unfavorable reaction A
→ B to a second, favorable reaction B → C will shift the
equilibrium constant for the first reaction.
6 The criterion for whether a reaction proceeds
spontaneously is ΔG not ΔG°, because ΔG takes into
account the concentrations of the substrates and products.
7 The oxygen consumed during the oxidation of glu-
cose in animal cells is returned as CO2 to the atmosphere.
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