What is the molarity of 555 L of a Ba(OH)2 solution if the pH is 10.20?
1 answer:
pH is a symbolic representation of:
and for water we now that:
that means the text give us the information to calculate the concentration of protons and therefore the concentration of ions OH-:
therefore the concentration of OH- can be calculated:
but they are not asking about the concetration of OH- they ask about concentration of Ba(OH)2 and for that we need to know the disolution stechiometry
Whic mean the concentration of Ba(OH)2 is half the concentration of OH-:
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Hope this helps you.
Answer:
Explanation:
To answer this question successfully, we need to remember that atoms are neutral species, since the number of protons, the positively charged particles, is equal to the number of electrons, the negatively charged particles. That said, we may firstly find an atom which has 3 electrons (and, as a result, 3 protons, as it should be neutral).
The number of protons is equal to the atomic number of an element. We firstly may have an atom with 3 protons and 3 electrons (atomic number of 3, this is Li).
Similarly, we may take the atomic number of 4, beryllium, and remove 1 electron from it. Upon removing an electron, it would become beryllium cation, .
We may use the same logic going forward and taking the atomic number of 5. This is boron. In this case, we need to remove 2 electrons to have a total of 3 electrons. Removal of 2 electrons would yield a +2-charged cation: .