Rank following acids frommost to least acidic:
hydrocyanic acid (HCN) Ka = 6.2 × 10−10
hypoiodous acid (HOI) Ka = 2 × 10−11
chlorous acid (HClO2) Ka = 1.2 × 10−2
acetic acid (CH3COOH) Ka = 1.8 × 10−5
1. HOI > HClO2 > CH3COOH > HCN
2. CH3COOH > HCN > HOI > HClO2
3. HClO2 > CH3COOH > HCN > HOI
4. HCN > HOI > HClO2 > CH3COOH
Is the answer #3?
Yes. Very good.
Batara!!!
Yes, the correct answer is #3: HClO2 > CH3COOH > HCN > HOI. The ranking is based on the values of their respective acid dissociation constants (Ka), where the larger the Ka, the stronger the acid.
To rank the acids from most to least acidic, we need to compare their acid dissociation constants (Ka). The smaller the Ka value, the weaker the acid.
Let's compare the given acids:
1. hydrocyanic acid (HCN) Ka = 6.2 × 10−10
2. hypoiodous acid (HOI) Ka = 2 × 10−11
3. chlorous acid (HClO2) Ka = 1.2 × 10−2
4. acetic acid (CH3COOH) Ka = 1.8 × 10−5
Now let's rank them in order from most acidic to least acidic:
The acid with the highest Ka value is HClO2, making it the strongest acid.
Next is CH3COOH, with a smaller Ka value than HClO2 but still stronger than the remaining two.
After that is HCN, which has a smaller Ka value than both HClO2 and CH3COOH.
Finally, HOI has the smallest Ka value, indicating that it is the weakest acid.
Thus, the correct ranking is:
HClO2 > CH3COOH > HCN > HOI
Therefore, the answer is not #3. The correct answer is #2:
CH3COOH > HCN > HOI > HClO2