To rank the acids according to their strength, we need to consider their equilibrium constant (K_s) values. The acid strength is directly related to its equilibrium constant value: the larger the K_s value, the stronger the acid, because it dissociates more in water.
Here are the given equilibrium constants:
- [tex]\( C_6H_5OH \)[/tex]: [tex]\( K_s = 1.3 \times 10^{-10} \)[/tex]
- [tex]\( CH_3CO_2H \)[/tex]: [tex]\( K_s = 1.8 \times 10^{-5} \)[/tex]
- [tex]\( HCO_3^{-} \)[/tex]: [tex]\( K_s = 4.8 \times 10^{-11} \)[/tex]
Now let's compare these values from smallest to largest:
- [tex]\( 4.8 \times 10^{-11} \)[/tex]
- [tex]\( 1.3 \times 10^{-10} \)[/tex]
- [tex]\( 1.8 \times 10^{-5} \)[/tex]
Based on these K_s values, we can rank the acids according to their acid strength:
1. [tex]\( HCO_3^{-} \)[/tex]: [tex]\( K_s = 4.8 \times 10^{-11} \)[/tex] (weakest)
2. [tex]\( C_6H_5OH \)[/tex]: [tex]\( K_s = 1.3 \times 10^{-10} \)[/tex]
3. [tex]\( CH_3CO_2H \)[/tex]: [tex]\( K_s = 1.8 \times 10^{-5} \)[/tex] (strongest)
Therefore, the ranking from weakest to strongest acid is:
[tex]\( HCO_3^{-} \)[/tex], [tex]\( C_6H_5OH \)[/tex], [tex]\( CH_3CO_2H \)[/tex]