-- Find out what 'e' is.
-- Double it.
-- Add 10.
The answer is good as long as 'e' doesn't change.
Then you have to do it all over again.
The expression "2E plus 18" can be interpreted mathematically as (2E + 18). If (E) represents a variable or a number, the result will depend on the value of (E). For instance, if (E = 1), then (2E + 18 = 20). Without a specific value for (E), the expression remains (2E + 18).
9E-05x
oxidation
2e - 12 = 7e + 8Add 12 to both sides: 2e = 7e + 20 subtract 7e from both sides: -5e = 20 divide both sides by -5: e = -4
MgCl2 aq plus Zn s is the oxidation half-reaction for Mg s plus ZnCl2 aq.
It can be simplified to: 4f+2e
Zn2+ + 2e- <--> Zno -0.7618 V
Cu + Mg2 --------> Cu2 + Mg Cu --------------> Cu2 + 2e Mg2 + 2e --------> Mg Cu --------------> Cu2 + 2e (E = +0.35) Mg2 + 2e --------> Mg (E = -2.36V) +0.35 + (-2.36) = -2.01V --------------------------------------… Mg + Cu2 --------> Mg2 + Cu Mg --------------> Mg2 + 2e Cu2 + 2e --------> Cu Mg --------------> Mg2 + 2e (E = +2.36V) Cu2 + 2e --------> Mg (E = -0.35V) +2.36 + (-0.35) = +2.01V
Simplified is 5e-2f.
2e-bc/a = 2 2e - bc / a = [2(20) - (3)(10)] / 5 = [40-30]/5 = 10/5
9E-05x
oxidation
Mg equals Mg2+ plus 2e-
-2.37 V (apex) Chace
Zn(s) → Zn2+(aq) + 2e- and Fe3+(aq) + e- → Fe2+(aq)
2e - 12 = 7e + 8Add 12 to both sides: 2e = 7e + 20 subtract 7e from both sides: -5e = 20 divide both sides by -5: e = -4
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