Question

d. H.CO; and NaHCO3 pilot ict whether each of the following pairs of substances unction as a buffer system in aqueous solution. 10-108 Predict whether each could function as a buffer system a. HNO, and HCI b. HNO, and KNO, C. NaC,H,O, and KC,H,O, d. HC,H,O, and NaNO3

Answer 1

*Buffer is a solution which resist the change in pH.. no Cansination of weak acil and its conjugate Base will ack as acidic buffer or Combination of weak base and its conjugate and will act as a basic buffer. ao HNO and the } not a buffer as both HNO & HCl are strong Acid, and there is not a 3. HNO and KNU Nitrousa cod No, (conjugate Bars of weak (weak a cêd) I and HNO) > Buffer) - (Audit Buffer) c. Na Na C h O and K Q H ę } - Not a Belle (Cheolona) can cook, only conjugate Base 4 cos is present there is no acid . Buffer both speue

and Nonly (a) HG, H, O₂ (A Coon) Y weak and but there is no conjugate base of week to acid liecięcero is not present) Hence it is not a buffer. is, On Part (6) Reffer undertion the evento test whicle in rest of the . parts Buffer Condition doesn't exist. X 0.003OM H, Poy means 0,003 moles of Hlou i kreant uid le of solution. 4. eo le (for acid nofactor ü Struction of H₂ POO он defined as the no. of furnishable l furnishable Hoias ( which is eqreal to the term Basicity) so Hence moles of hero = 0.003 n-factor = 2) mnoles of He po = 0.00381000 = 3 mmoles oth page = 3 mmoles x(n-factor of H₂ PO millling of heao = 3 mmoles x = 3x2=6 meg ke tens) . (meg. Hence ( Concentration of the logo a 6 mesle] * (as Nace . as a Nace lagy ne Nat (aq) No.o + ce-(as) ferns produced when dissolved in water : 2 (6) Mg(NO3) a Mght(aq) + 2NO (he), No of can produced When dissolved in water - 3.

co K₂5 (aq) - 2K+ (aq) + 32 (ar) total no of i'am froduced per Jormule unit S-3. (d) NHCN lor) 1994 NHU + CN (48) Totul no. of com produced per formule unit of - Nhy CN = a. the reaction between * salte is the neutralisation product of acid & base : a. Kcal and NacN / Both are salla as both KCN & Na CN are the neutralisation product of (ROH, HEN) ; (Nad H, HEN) respectively, b. Hel - not a sallo (It's an acid) 1. Lice - balt. ( Neutralisation product of Lion and Hel) c. Na, sou Nowh sall (Neutralisation product of Naotats not a talls ( It's a Base ) - di AMNO), a Ca(NO3 ] - Both are salle - Neutralisation products of Neutralication product of Alloh), a HNO Capoty a HNO,