16. which of the following aqueous solutions contains the greatest number of 10ns.
a) 400.0 ml of 0.10 m nacl
b) 300.0 ml of 0.10 m cacl2
y 200.0 ml of 0.10 m fecl3
d) 200.0 ml of 0.10 m kb

Explanation:

a) 400.0 mL of 0.10 M NaCl

(i) Moles of NaCl

(ii) Moles of ions

NaCl(s) ⟶ Na⁺(aq) + Cl⁻(aq)

We get 2 mol of ions from 1 mol of NaCl

b) 300.0 mL of 0.10 M CaCl₂

(i) Moles of CaCl₂

(ii) Moles of ions

CaCl₂(s) ⟶ Ca²⁺(aq) + 2Cl⁻(aq)

We get 3 mol of ions from 1 mol of CaCl₂

c) 200.0 mL of 0.10 M FeCl₃  

(i) Moles of FeCl₃

(ii) Moles of ions

FeCl₂(s) ⟶Fe³⁺(aq) + 3Cl⁻(aq)

We get 4 mol of ions from 1 mol of  FeCl₃

d) 200.0 mL of 0.10 M KBr

(i) Moles of KBr

(ii) Moles of ions

KBr(s) ⟶ K⁺(aq) + Br⁻

We get 2 mol of ions from 1 mol of KBr

it's filtration, but this is an assumption so my apologies if i got this

14,16 18 reacts with group