Problem: Assuming equal concentrations, rank these solutions by pH from highest pH to lowest pH. Sr(OH)2(aq)NaOH(aq)NH3(aq)HBrO(aq)HI(aq)

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We're being asked to rank the solutions by pH from highest pH to lowest pH. 

highest pH → most basic

lowest pH → most acidic


Sr(OH)2(aq) → Group 2A ion (Sr-) paired with OH-strong base (but with 2 OH- per 1 unit) → higher pH than NaOH

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Problem Details

Assuming equal concentrations, rank these solutions by pH from highest pH to lowest pH. 

Sr(OH)2(aq)

NaOH(aq)

NH3(aq)

HBrO(aq)

HI(aq)

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the pH and pOH concept. You can view video lessons to learn pH and pOH. Or if you need more pH and pOH practice, you can also practice pH and pOH practice problems.