Question

question 2 & 3

2. Consider the following solutions at 25°C. Identify the major species present in our solution, and classify each solution as acidic, basic, or neutral. Major species Acidic/Basic/Neutral? 1. 1.0M CHNH3Br (aq) Solution II. 1.0M NHNH3CIO(aq) Explain your reasoning for your classification for Solution II. 3. Calculate the molarity of a Na2HPO4 solution that would yield a pH of 10.59 at 25°C. Formula _ _ 4.2 x 10-13 H.PO. 7.2 x 10 6.3 104 K Molarity =

Answer 1

The salt which are formed by the reaction of weak and with strong base or strong acid with base undergo hydrolysis and make solution acidie or basic. And Conjugate acid of weak base or conjugate base of weak acid undergo hydrolysis conjugate acid or base of strong acid s strong base do not undergo hydrolysis.

4: - 1. b ]: o 1.OM CH₂ NH ₂ Br ed HBV so do not undergo hydrolysis CH3N43 Brcal) — Charyza Cap.) + Br"Cap:) Br- is conjugate base of strong acid HBY But CH3 Nust undergo hydrolysis, making solution CH3 N43 (ap.) +420 ² CH₃NH2O4 +ht (ap) due to it realsed it is acidic . major species : CH3 NH3 , BIE", H* . 2. lOm NH2 N42 clolar) - here here NH3 NH - NU NH3 (af) + 400 (ap.) * NH₂ NH3 C10 (af) Both undergo hydrolysis H2O + clo-cap.) Ž Hulot 04 N43 NH3 + H2O È NH3NH oH + Ht cap) since it salt of weak and a weakbase so both undergo hydrolysis and producing hydrogen im and hydroxide im. it the pkat aid obtained

png such solution given as b1= (рко трка - bКь) Рka1 acid oblains 4 ho = 2.4, как pkb J base oblained N43N4204 = 5.9 Би = 1 ( 14 +7-46 – 5- 4) = 7-ав solution is basic. во" і basic audie рк42 рк, - ркъ7 рка Вka = pк, solution is solution is solution is neutral major specius - Nights, co-, -oh