Question

Acid pka Conjugated base Acid OH 00 15.2 H SO HyC HO- 15.7 17 HO+ NH "NH wo HAC CHE HOC HọcoỒ CH, Họco CHỊ | пен HC- H H ,C- 25.5 NHA 0910 . NH NH₂. 38 NO2 10.5 | 20 11 21 un 5 HC-SH CH₃- 48 OCH, Assignment: First, find your name in the next pages. Beside your name, 3 acid-base couples are given by numbers. They refer to acid or base find in the table on this page. Two of them are in black. For those two, write a reaction scheme including the structure of the conjugated base and the conjugated acid, and then you use the pka given in this table to predict in which direction the reaction would be favoured (starting materials of products). One of the three is in red. For that one, you do not use the pka, but your knowledge to predict in which direction the reaction would be favoured. You start by writing the same type of reaction scheme, then using resonance, and or induction and or electronegativity, etc (but not the pka) predict which of the starting materials of products would be favoured. Acid Bage coupues : Red : # 9 st 17 2 Blact: # 18 3 Black: #21 — # 15

Answer 1

Rei H + NE TON backund CEN + NO2 и No H stong alectron with deowing No is a CEN ISO ueak efection withdaowing graup than No. So ado tt has shengLepf ect en H atom on aton of-Can ban. So Hatem is less aidic a Canbon iS mose ai dic

0e is Stabiised b 3 eAonanre NO3 forms whe re as two is unstable bhich mean that itIS factive, that mean staeng bae more NOs stable wealk bare CN Unstaule staong base

Let s check with pka values The less pka ualue compound olth streng a an act AT COO The acid. Compound ith moe pka vakie acts as se weak acid. weak aid pka 25 N shrong conjge bare ON pka lo.5 Cshould acts as and d streng acid weak conjuga te bare Same is discassed bePore with aut pka values Let us de cide vemaining by using the pka Values.

n&18 Black o Hs pke 25-5 pka t.S more pka less pka eweak acid streng acid stong conjyale bae acts as acid conjuga te actA base base op (18 stron bave strny HK weak ba Ae weak acid

21715 Black: 15 Pka= 40 rka= 20 less pka mose pka Strengacid weak acid weak conjugate bare stront cntiae bave 1Sact as acid conjugale balesp ( act aS oa ke strent conugote bane strong aud CH3 + veak conjugte bane weak acid