58 Select the correct answer.
Which equilibrium represents a buffer equilibrium?
OA HI + H20 = H30* +1
OB. HCN + H2O = H30* + CN
OC. NaOH = OH + Na
OD. HCI + H2O = H30* + c
OE. HCIO4 + H2O = H30* + CIO4
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Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.