For the following reaction, which product is acting as an acid? H 2 O + HCO 3 -

Question

For the following reaction, which product is acting as an acid?

             H2O + HCO3- <--> OH- + H2CO3

H2CO3

H2O

OH-

HCO3-

Which of the following could be an acid?

NH3

HCN

PO43-

Cl-

What side reaction occurs when H2CO3 is formed in aqueous solution?

3. H2CO3 (aq) + Ca(OH)2 (aq) ---> CaCO3 (s) + 2 H2O (l)

H2CO3 (aq) + H2O (l) <---> H3CO3+ (aq) + OH- (aq)

H2CO3 (aq) <---> H2O (l) + CO2 (g)

H2CO3 (aq) ---> HCO2+ (aq) + OH- (aq)

4.

What is the concentration of arsenic, in parts per million, when 5.3 mg of arsenic are present in 80.0 g of soil?

660 ppm

15 ppm

66,000 ppm

66 ppm

H2CO3

H2O

OH-

HCO3-

Explanation / Answer

1: H2CO3

2: HCN

3: H2CO3 (aq) <---> H2O (l) + CO2 (g)

4: 66 ppm

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