What is the hydronium ion concentration in a solution of hcl that has a ph of 4.65? × 10n m n = what is the hydroxide ion concentration in a solution of nh3 with a poh of 4.65? × 10n m n =

These are two questions and two answers:

1) What is the hydronium ion concentration in a solution of HCl that has a pH of 4.65?

i) Data:

pH = 4.65
[H₃O⁺] = ?

ii) Formula: pH = - log [H₃O⁺]

iii) Calculations: 

4.65 = - log [H₃O⁺] ⇒ [H₃O⁺] = 



2) What is the hydroxide ion concentration in a solution of NH3 with a pOH of 4.65?

i) Data:

pOH = 4.65
[OH⁻] = ?

ii) Formula: pOH = - log [OH⁻]

iii) Calculations: 

4.65 = - log [OH⁻] ⇒ [OH] = 

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na