Effect of pH

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Xuan Kuang 2L
Posts: 31
Joined: Wed Nov 14, 2018 12:23 am

Effect of pH

Postby Xuan Kuang 2L » Mon Jan 21, 2019 9:47 pm

Hello there, not sure if anyone asked this already, but could someone explain to me how we know that Group I/II and some of the halogens (Cl-, Br-. I-) have no effect on the pH when it dissociates in water?

Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: Effect of pH

Postby ryanhon2H » Mon Jan 21, 2019 9:53 pm

This was in Chem14A, where some anions or cations are basic/acidic when dissociating in water so they can affect the pH. On page 478 in the 7th edition textbook there are a couple of tables that say which ions affect pH.

Fanny Lee 2K
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: Effect of pH

Postby Fanny Lee 2K » Tue Jan 22, 2019 12:01 am

If I remember correctly Dr. Lavelle noted that the group II elements would affect the pH slightly but not significant enough so that the pH is affected. Keep in mind that sometimes the textbook would write equations using the double arrows for the 2+ cation.

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