Question 10, HW Week 10

[Sophia Olender 2J]

The question asks you to arrange solutions from highest to lowest pH. I knew that HNO3 is a strong acid, so it has the lowest pH. HBrO is a weak acid, so it's the next highest on the list. NH3 is a weak base, so it goes after HBrO. However, RbOH and Sr(OH)2 are both strong bases. How do I determine which has the higher pH?

[Elena Chan 2L]

Hi! To answer this question, you need to see how strong the two bases are relative to each other. In regards to this question, Sr(OH)2 produces two OH− ions per formula unit, it will give a more basic solution than RbOH, which produces only one OH− ion per formula unit. Thus, Sr(OH)2 is more basic since it releases more hydroxide ions into a solution than RbOH would. Hope this helps!

[Anne Hogue 2J]

In order to figure out whether RbOH or Sr(OH)2 is stronger, it is good to know that the more OH- ions it produces, the stronger it will be. Therefore, Sr(OH)2 is a stronger base than RbOH.

[Omar Alami 3H]

Hi,

You would be able to determine which is the stronger base based on how many OH- ions in the formula. Since Sr(OH)2 produces 2 and RbOH only produces one, we can conclude that Sr(OH)2 is a stronger base, thus making it have a higher ph.

[Abigail Tran 14a]

between RbOH and Sr(OH)2, Sr(OH)2 is the stronger base since it has 2 "OH"'s.

[Selene_Lam_1G]

The more H+ there are, the stronger the acid is. The more OH- there are, the more basic the solution. You can check on how many OH- there are in each compound, and the one with the higher number of OH reigns as the more basic compound