Determine whether each cation is acidic or pH-neutral. For those cations that are acidic, write an equation that shows how the cation acts as an acid. c. Co3+

Video transcript

Hello. In this problem, we are asked to identify whether chromium three is acidic or ph neutral. And to provide an equation that shows how it behaves as an acid. If we determine it to be acidic. Chromium three, then is a small, highly charged ion. And so when it interacts, then with water, that high positive charge is going to be attracted to these electrons. That means then that the electrons and the bond will be pulled towards the oxygen away from the hydrogen, making it easier than to pull off the hydrogen. In fact that chromium then is able to donate protons, makes it a weak acid Given then that chromium acts as weak acid. We will now provide an equation that shows this behavior. So chromium three then will become hydrated in water. We will associate with six water molecules. This hydrated form um chromium then acts as a weak acid. So it will donate a proton to water reform. Then chromium associated with five waters. Now when we lose a hydra nine, we have a hydroxide iron left which then reduces our charge by one and we generate hydrogen mines. So this is then our equation that shows how chromium behaves as a weak acid. Thanks for watching. Hope this helps.