객관식
What is the chemical formula for hydrosulfuric acid?
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3. Chemical Reactions
Naming Acids
객관식
Which of the following is the chemical formula for the conjugate acid of the carbonate ion, CO_3^{2-}?
A
CO_3^{2-}
B
CO_2
C
H_2CO_3
D
HCO_3^{-}
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검증된 단계별 안내1
Understand that a conjugate acid is formed when a base gains a proton (H\^+). In this case, the base is the carbonate ion, CO\_3\^{2-}.
Write the chemical formula of the base: CO\_3\^{2-}. When it gains one proton (H\^+), the charge will increase by +1, because a proton has a +1 charge.
Add one hydrogen ion (H\^+) to the carbonate ion to form the conjugate acid. This gives the formula HCO\_3\^{-}, where the charge is now -1.
Recognize that HCO\_3\^{-} is called the bicarbonate ion, which is the conjugate acid of the carbonate ion.
Confirm that the other options (CO\_3\^{2-}, CO\_2, H\_2CO\_3) do not represent the conjugate acid formed by adding a single proton to CO\_3\^{2-}.
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