00:01
This question asks us to consider the alkaline earth metals and to compare the acidity of the 2 plus cat ions when we go down the group.
00:14
Now, in your book for the alkaline earth metals, you'll notice this equation, and it actually discusses the basicity of these metals.
00:22
So that's going to give you a hint that these are actually pretty basic.
00:26
So what can we say about the acidity? well, remember, we're interested in this cat ion and not the solid.
00:34
So if we take this cat ion, we change the black, and if it's going to act as an acid, it would need to accept two electrons in order to form the metal solid again.
00:51
So this is the hypothetical if it acts as an acid.
00:55
And we need to see along here what trend seems to form.
01:03
So what i'm going to do, i'm going to draw a nucleus here.
01:07
We're going to say this nucleus has a 2 plus charge.
01:10
And i'll draw another one for comparison...
