Chemistry Oxidation and Reduction?
Can someone explain how to do this? I copied it from the board, but I don't quite understand how to do it. Thanks in advance.
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Bygaba88
2NaOH + H2CO3 -> Na2CO3 + 2H2O Mass of H2CO3 = 186 mg = 0.186 g Number of moles of H2CO3 = Mass / Molar mass = 0.186 g / 62.01 g/mol = 0.003 mol H2CO3 0.003 mol x 2 = 0.006 mol NaOH. Volume of NaOH solution = 0.006 mol / 0.6 mol/L =…
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Concepts and their meaning must be embossed like vocabulary.
Atoms are electrically neutral. Electrons are simply negative.
Metals release electrons and become positive, non-metals take them up and become negative.
The number of electrons which can be emitted or taken up can be seen in the periodic system (main groups).
1,2,3,4,3,2,1,0
For subgroup elements (all metals) it is necessary to learn how many electrons are emitted (e.g. Hg: 2, Fe: 2 or 3, Ag: 1 etc.)
In the formula, the 1 is not written (it is already a symbol of it).
Thank you, maybe you can give me an example.
Ca+S
Try it: Ca is a metal. Where is the period system? How many electrons does Ca give off? You’ve already got sulfur on your part. Then it’s really easy.