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hofstra.blackboard.com Home - hofstra .edu Takke Test: Unit 5 Homework: Chemical React Question Completion Status: Identify the precipitate in the following reaction: Agcio3 (aq) + Mg12 (aq) Agl + Mg(C103)2 Agl Mg(CIO3)2 no precipitate Question 9 Match each definition with the correct term. gets oxidized gets reduced gains electrons loses electrons A oxidant B. reductant Question 10 Select all of the compounds that would be soluble in water AgNO3 AgSCN CaCO3 KCI Na2CO3 Pb504 Question 11 What is the oxidation state of each element in K2Cr207 K: Cr:Explanation / Answer
8) In the reaction
2 AgClO3 (aq) + MgI2 (aq) ------------> Mg(ClO3)2 (aq) + 2AgI (s)
the precipitate is AgI
OPTION
9) Oxidant gets reduced
Reductant gets oxidised
Oxidant gains electrons
Reductant loses electrons.
An oxidant is a substance which oxidises others and reduces itself by gaining oelectrons.
A reductant is a substance which reduces others and oxidises itself by losing electrons.
10)
AgNO3 - soluble
AgSCN - insoluble
CaCO3 - insoluble
KCl - soluble
Na2CO3 -soluble
PbSO4 - insoluble
11) K2Cr2O7
Oxidation state of K = +1
Oxidation state of Cr = +6
Oxidation state of O = -2
K a nd O have fixed oxidation states of + 1 and -2 while that of Cr is calculated using these two fixed values.
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