(b) CH3 CH3 Br NaOCH3 80 °C

Which has the greater polarizability? Explain.(a) Br- or I-       (b) CH2 = CH2 or CH3—CH3      (c) H2O or H2Se

Please name the following compounds.

(b) Calculate the pH of 0.0005 mol dm-3 ethanois acid when its pKa = 4.75 CH;COOH() -> CH;COO (a H(a + Ka = pH =

(a) When 3-bromo-2,3-dimethylpentane, (CH3)CH2CBr(CH3)CH2CH 3, reacts with aqueous potassiumhydroxide, an alcohol is formed.(i) Name the type of reaction taking place and give the role of the reagent.Type of reaction ...............................................................................................Role of reagent .................................................................................................(ii) Outline a mechanism for the reaction, showing clearly the structure of the alcohol formed. (b) When 3-bromo-2,3-dimethylpentane reacts with ethanolic potassium hydroxide, three structurallyisomeric alkenes are formed.(i) Name the type of reaction taking place and give the role of the reagent.Type of reaction ...............................................................................................Role of reagent .................................................................................................(ii) One of the reaction products is…

(5) Br CH H20 CH;CH;CH; ( ) ČH,CH3 Br CH;C=CNa ( ).

(b) Calculate the pH of 0.0005 mol dm3 ethanoic acid when its pKa = 4.75 CH3COOH( CH3COO() + H™ Ka = pH =

Ethylene (C₂H₄) is the starting material for the preparationof polyethylene. Although typically made during the processingof petroleum, ethylene occurs naturally as a fruit-ripening hor-mone and as a component of natural gas. (a) The heat of reactionfor the combustion of C₂H₄ is 1411 kJ/mol. Write a balancedthermochemical equation for the combustion of C₂H₄. (b) Howmany grams of C₂H₄ must burn to give 70.0 kJ of heat?

OH OH (1) NaOH - (x) (2) H® Reactant x is : 7. (a) CH3CI (b) CH 2C12 (c) CHCI3 (d) CCI4

(b) H CH2CH3 ·C. -CH2CH3 CH3 CH3OH (H)