Chapter 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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elements | oxidation # is zero
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monatomic ions | oxidation # equals charge on the ion
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oxygen | oxidation # is -2 on most compounds except peroxides
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hydrogen | oxidation # is +1 in most compounds, (-1 in metal binary compounds ex CaH2)
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halogens | oxidation # is -1 in F. Cl, Br, and I is -1 in binary compounds except when the other element is another halogen above it or oxygen
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Compounds and ions | oxidation # is the sum of numbers in compound=0
sum of numbers in polyatomic ions = charge on ion
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CO3 2- evolves to | CO2 + H2O
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SO3 2- evolves to | SO2 + H2O
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S 2- evolves to | H2S +H2O
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Group 1A and NH4+ compounds | soluble
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C2H3O2- and NO3- | soluble
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Cl- Br- I- | soluble except Ag, Hg, Pb bonded
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SO4 2- | soluble except Ca, Sr, Ba, Ag, Hg, Pb
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CO3 2- | insoluble except group 1A and NH4+
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PO4 3- | insoluble except group 1A and NH4+
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S 2- | insoluble except group 1A and NH4 +
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OH- | insoluble except group 1A, Ca, Ba, Sr
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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