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bowlinL7252
 2 years ago
Hi guys, one question with a couple of parts!
What is the oxidation state for the atoms in the reaction:
2Al + 8H2O → 2H+1 + 3H2 + 2Al(OH)41
a) Elemental aluminum (Al)
b) One hydrogen atom in H2O
c) One oxygen atom in H20
d) Elemental hydrogen (H)
e) One aluminum atom in Al(OH)41
f) One oxygen atom in Al(OH)41
g) One hydrogen atom in Al(OH)41
bowlinL7252
 2 years ago
Hi guys, one question with a couple of parts! What is the oxidation state for the atoms in the reaction: 2Al + 8H2O → 2H+1 + 3H2 + 2Al(OH)41 a) Elemental aluminum (Al) b) One hydrogen atom in H2O c) One oxygen atom in H20 d) Elemental hydrogen (H) e) One aluminum atom in Al(OH)41 f) One oxygen atom in Al(OH)41 g) One hydrogen atom in Al(OH)41

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aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1oxidation state on homonuclear molecules or elemental species = 0

aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1you can figure out the rest by balancing the charges

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0Alright, so for a i got 0, b 3, c 2, d 1, e 2, f 2 and g 0. Are these right?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1Let me see if I get this right: You suggest that hydrogen in water have the oxidation number 3?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1Okay. We need an additional rule: "The sum of oxidations numbers most equal to total charge of the molecule." So when we look at water it have no charge... sense oxygen always get 2 each hydrogen most be what?

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.05? And in that equation, which element was reduced and which was oxidized?

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0And can verify my answers please?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1Best you get some training, so I'm gonna start with water and we take them each by each. H2O we take notice: Total charge = 0 oxygen always 2 Hydrogen always +1 This also make sense we should say: 0=2+2*x <> x=+1

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1aluminum is right. again it does not have charge and is an elemental species.

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0Both hydrogens are positive one as well?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1Yes. it is 2 times +1

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0Alright, so what about for e through g?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1Sorry I was thinking. both e and g are wrong.

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1The oxidation state of oxygen is 2 the oxidation state of hydrogen is +1: so we get: Al(OH)4 1 1 = 8+4+x Here is x the oxidation state of Al.. What is x?

Frostbite
 2 years ago
Best ResponseYou've already chosen the best response.1\[1=8+4+x\] \[x=1+84=3\]

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0So aluminum was reduced, so which was oxidized?

aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1which one are you working on?

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0I need the answer for g and then: In the equation above, which element was reduced and which element was oxidized?

aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1The H on the compound is part of the hydroxide ion, which is OH^ since O is 2 and theres a 1 charge on ion, H is +1

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0Awesome. so then which was oxidized and which was reduced?

aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1they're both 0 when not part of a molecule, if one gains e then we say its reduced because it became more negative, the opposite is for oxidized.

bowlinL7252
 2 years ago
Best ResponseYou've already chosen the best response.0I mean for all of the elements in the equations, it seems like aluminum gained electrons

aaronq
 2 years ago
Best ResponseYou've already chosen the best response.1we already did everything in the equation
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