Degree of dissociation. Ionic equations
Answers are for parents and teachers.
1
Write the net ionic equation for Cu(NO₃)₂ + 2NaOH → Cu(OH)₂↓ + 2NaNO₃.
Cu²⁺ + 2OH⁻ → Cu(OH)₂↓
2
Of 250 molecules, 5 have dissociated. Find α %.
2
3
If 600 formula units of K₃PO₄ dissociate at α = 50 %, how many ions (K⁺ and PO₄³⁻) form in total?
1200
4
Heating NH₄Cl solution with NaOH releases NH₃. Write the net ionic equation.
NH₄⁺ + OH⁻ → NH₃↑ + H₂O
5
Why does no reaction occur when KNO₃ and NaCl solutions are mixed?
No precipitate, gas or poorly dissociating substance forms; all the ions stay in solution.