pH of hard water

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Jeffrey Hablewitz 2I
Posts: 100
Joined: Wed Sep 30, 2020 9:33 pm

pH of hard water

Postby Jeffrey Hablewitz 2I » Fri Dec 11, 2020 3:52 pm

Is hard water acidic or alkaline? I think Lavelle said that hard water is acidic, but a UA and a few other online resources state that it is generally alkaline. It seems like it would make more sense if hard water is alkaline because it contains CO32- ions which would deprotonate H2O, but I'm not sure.
Last edited by Jeffrey Hablewitz 2I on Fri Dec 11, 2020 4:03 pm, edited 1 time in total.
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Mikayla Kwok 3K
Posts: 109
Joined: Wed Sep 30, 2020 9:51 pm

Re: pH of hard water

Postby Mikayla Kwok 3K » Fri Dec 11, 2020 3:58 pm

I think hard water is alkaline, because it contains a bunch of minerals with cations.
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Jade_Tai_2L
Posts: 53
Joined: Wed Sep 30, 2020 9:33 pm

Re: pH of hard water

Postby Jade_Tai_2L » Fri Dec 11, 2020 4:09 pm

I think hard water is usually alkaline-- do you remember where did Dr. Lavelle mentioned it was acidic? I forgot.
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Sophia Spungin 2E
Posts: 103
Joined: Wed Sep 30, 2020 9:41 pm

Re: pH of hard water

Postby Sophia Spungin 2E » Fri Dec 11, 2020 4:58 pm

From what I have learned in other classes about water quality, hard water is more alkaline and has to do with the presence of multivalent metallic cations. Soft water is more acidic.
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Jeffrey Hablewitz 2I
Posts: 100
Joined: Wed Sep 30, 2020 9:33 pm

Re: pH of hard water

Postby Jeffrey Hablewitz 2I » Sat Dec 12, 2020 12:49 pm

Thanks for all the responses! I checked with a TA who confirmed that hard water is alkaline.
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