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☆☆☆☆☆Cards in this guide (8)
What is the oxidation state of s in HSO4 2-
In HSO4- sulfur's oxidation state is +5.
Why are half-reactions used in redox reactions
They make it easier to see the oxidation and reduction parts of the reaction separately.
What coefficient would the O2 have after balancing C3H8 O2 CO2 H2O
5
What does not state a property of electricity
It is a flow of protons
In the reaction FeCl2 plus 2NaOH gives iron II hydroxide plus 2NaCl 6 moles of FeCl2 are added to 6 moles of NaOH how many moles of FeCl2 would be used up in the reaction
FeCl2(aq) + 2NaOH(aq) --> Fe(OH)2(s) + 2NaCl(aq)Thus 2 moles of sodium hydroxide react with every mole of iron(II) chloride.
Here we have only enough sodium hydroxide to react with 3 moles of iron(II) chloride.
What is the oxidation half-reaction for 2Mg plus O22MgO
2Mg(s) + O2(g) ==> 2MgOMg ===> Mg^2+ + 2e- [x2 to balance electrons] = oxidation half reaction
O2 + 4e- ===> 2O^2-
So, the final oxidation half reaction will be:
2Mg(s) ===> 2Mg^2+ + 4e-
How is stoichiomerty used to calculate amount of product from amount of reactant
the coefficients give the ratio of moles reactant to moles product
How do the coefficients in a balanced equation compare quantites of two substances
These coefficients show the number of molecules involved in the chemical reaction.
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