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Ostrovityanka [42]
3 years ago
15

Question 1 2.5 cm= mm

Physics
2 answers:
Nookie1986 [14]3 years ago
8 0
There’s 10mm in a cm: 22mm
Elden [556K]3 years ago
4 0
2.5cm=25mm

i hope this helps!
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What is the half-reaction that occurs at the cathode during the electrolysis of molten potassium bromide?
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The complete ionization of KBr into its constituents is:<span>
<span>KBr (s)  --->  K+ (aq)  +  Br- (aq)</span></span>

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During electrolysis, oxidation takes place at the anode electrode. This means that an ion is stripped off its electron hence becoming more positive:
<span>2 Br- (aq)  --->  Br2 (g) + 2e- </span></span>

We can see that Bromine gas Br2 is evolved at the anode. 

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<span>Meanwhile at the cathode, the reduction reaction occurs. Which means that the electron from the anode electrode is used to make an ion more negative:
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Half reactions:

<span>Anode: 2 Br- (aq)  --->  Br2 (g) + 2e- </span>                       

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2 years ago
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