Question

question 32 (1 point)
three bottles are labelled as shown:

bottle 1	0.001 mol/l hcl(aq)
bottle 2	0.003 mol/l hbr(aq)
bottle 3	0.002 mol/l koh(aq)

arrange the bottles in order of decreasing ph.
○ bottle 3 > bottle 1 > bottle 2
○ bottle 2 > bottle 1 > bottle 3
○ bottle 1 > bottle 2 > bottle 3
○ bottle 3 > bottle 2 > bottle 1
○ bottle 2 > bottle 3 > bottle 1

Explanation:

Step1: Analyze Acid/Base Type

HCl and HBr are strong acids (completely dissociate), KOH is a strong base (completely dissociates). Strong bases have higher pH than strong acids. So Bottle 3 (KOH) has highest pH.

Step2: Compare Acidic Solutions

For strong acids, \([H^+] = \text{concentration}\) (since 1:1 dissociation). Bottle 1: \([H^+] = 0.001\ \text{mol/L}\), Bottle 2: \([H^+] = 0.003\ \text{mol/L}\). Higher \([H^+]\) means lower pH. So Bottle 1 (lower \([H^+]\)) has higher pH than Bottle 2.

Step3: Order by Decreasing pH

Combine: Bottle 3 (base) > Bottle 1 (weaker acid) > Bottle 2 (stronger acid).

Answer:

Bottle 3 > Bottle 1 > Bottle 2