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Salt Solutions

Posted: Mon Jan 20, 2020 3:36 pm
by Janet Nguy 2C
First of all, what exactly is a salt and how can you identify it within a reaction?

Secondly, how is calculating the pH of a salt solution going to be different than calculating the pH of acid/base solutions?

Re: Salt Solutions

Posted: Mon Jan 20, 2020 4:36 pm
by GFolk_1D
Hi! I found this video to be very useful on this topic. https://www.khanacademy.org/science/che ... -solutions

Re: Salt Solutions

Posted: Mon Jan 20, 2020 7:27 pm
by christabellej 1F
A salt is composed of a positively and negatively charged ion. It shouldn't be different from calculating other acid/base pH. Usually, one part of the salt will influence the pH - for example, in NaC2H3CO2, C2H3CO2 is negatively charged and will make for a basic solution. You would just do the ICE table with C2H3CO2- in water, just like any other acid base problem.

Re: Salt Solutions

Posted: Mon Jan 20, 2020 7:37 pm
by Emily Chirila 2E
First you need to be able to recognize which parts of a salt don't affect pH (group 1&2 elements, like Na+). Once you recognize what part of the salt WILL affect the pH, you write the reaction for that part of the salt reacting with water to form it's conjugate acid/base and either H3O+ or OH-, depending if the reactive part of the salt is an acid (will form H3O+) or a base (will form OH-). From there you can use an ICE table to calculate pH or whatever the problem is asking you for.