Question

FeCl3(aq) + NaOH(aq) → 16. (2 pts.) What is the oxidation number of sulfur in the sulfite anion. S01 17. (3 pts. Based on Activity Series, which of the following single replacement reactions is(are) expected to happen? Select all the apply. a) Pb + Zn(C2H302)2 Pb(C,H,O2)2 + Zn c) Mg(NO3)2 + 2 Ag 2 AgNO, + Mg! b) 2 Al + Fe2O3 → Al2O3 + 2 Fe d) Br + 2 KI → 2 KBr + 1; 18. (8 pts.) Answer the following questions regarding the chemical equation: 4 NH + 3 0 ) 2 N2 + 6H5O O2 Н,0 a) Assign oxidation numbers to each atom in NH3 b) Which species is reduced? c) Which species is oxidized? d) Which species is the reducing agent? e) Which species is the oxidizing agent? naner and affix your signa

Answer 1

Ans 16) let oxidation number of S = a

a + 3(-2) = -2

a -6 = -2

a = -2+6 = +4

oxidation number of S = +4

Ans 17)

As aluminium is more reactive than iron and bromine molecule is more reactive than iodine molecule so the changes in B and D are expected to occur.

Option B and D are correct.

Ans 18)

Elements or compounds	Atoms with oxidation nunber
NH3	N = -3. : H= +1
O2	O = 0
N2	N = 0

H2O.	H = +1 ; O = -2

a) Species reduced = O2

Species oxidised = NH3

Oxidising agent = O2

Reducing agent = NH3