- #1
chikis
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Homework Statement
I have two questions:(1) Suppose we have solution W, X, Y and Z. Their pH are 8, 12, 4 and 2 respectively, from the information given which of the solution W, X, Y and Z will liberate carbon (IV) oxide from trioxocarbonate (IV) salt?
(2) Between CaCO3 and CaO, which is best for making mortar?
I used to think that CaCO3 is good for making mortar simply because another name for it is lime stone which is used in making cement for building. Can CaO be used as well?
Homework Equations
The Attempt at a Solution
As question (1):
If you look at the pH scale, we know that acidity increases from 6 to 1 and 7 is neutral. In the other hand, basicity increases from 8 to 14. We all know that, acid react with trioxocarbonate (IV) salt to librate CO2. From the pH scale, we already know that substance Y and Z are acidic having a pH of 4 and 2 respectively. Because of this, Y and Z will librate CO2 from trioxocarbonate (IV) solution? But I still failed the test. Is there anything am missing?
As for question (2):
I used to think that CaCO3 is good for making mortar simply because another name for it is lime stone which is used in making cement for building. Can CaO be used as well?