Question

Does a reaction occur when aqueous solutions of sodium hydroxide and iron(II) sulfate are combined? if so what is the net ionic equation?

Does a reaction occur when aqueous solutions of potassium nitrate and sodium hydroxide are combined? if so what is the net ionic equation?

Does a reaction occur when aqueous solutions of chromium(III) nitrate and sodium hydroxide are combined? if so what is the net ionic equation?

Answer 1

* Solubility rules can be used to determine if a precipitate will form. Hydroxides are only slightly soluble. Hydroxides of re, Al, Cocare not soluble in water. Net Jonic Equation o f 2NaOH (aa) & resou (aq) Fe(OH), (s) + Na₂SO4 (aq) 2Nat +20Ň + fe2+ +503 --> Fe(OH)2(3) + 2Nat f sos Cations interchange to give precipitation reaction fe rag) + 2 04 cant fe COH) (s)! KNO, lant NaOH(aq) - NaNO₂ (aq) + KOH (aq) Kt + Noz + Nattou Nat+ Noz t k t tou Double displacement reaction. All compounds are soluble in water since salts of K, Na are mostly soluble. No net ionic reaction . C (NO₃)3 (as) + 3NaOH (aq) G (OH)₂8) 4 3 NaNO3(aq) | 043+ + 3 NO3 + 3 Nat + 301 > Obetet Ben A Cr (OH)₂ + 3 Nat+ 3 Noz This is a precipitation reaction since QC0Hz is insoluble in water. Net Ionic reaction : Crist (aq) + 30r (aq) - CE COH) (s)