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susb023- prelab

# susb023- prelab - Aisha Awo.n oala~J-t-101\5~005 10 1...

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Aisha Awo.n (-t\-101\5~005) oala~J 10 1. Assuming the NaOH stock solution is 0.097 M, what are the initial concentrations of crystal violet and hydroxide ion in a solution made up of4.0 mL ofthe NaOH stock solution diluted to 50mL plus 50mLof 1.00X 10- 5 MCrystal Violet~n? (4.0ml) (LOa )\lO~5M) 4.0·~ \O-'i I "1 (50ml +'5DmL) -:::: lOOmL : [4.0 l( \O_1M] ;sthe lnit\~\ eooc€ntro.tion of C rysto, \ 'J io\e t o.nd h4droi\ide ion. 2. The reaction of a dye called "O'Hara Scarlet" with 2.00 X 10- 3 M sodium hydroxide solution is found to occur with apseudo rate constant ql of 0.84. With 4.00 X 10- 3 M sodium hydroxide, q2 is 3.36. Assuming the reaction isfirst order with respect to the dye,what are nand k forthis reaction? (Ifyou cannot dothis pre-laboratory exercise, you will also not be ableto analyze the exper~m~nta-::l d:t~~~~~Js~xerCiSe!)(\~ \ oq (~2&) =- \on (3{J"'3.~,) " _""_L:...-' _ .... _ __ V)_"'1 _ O.(OO·205QQQI3 't, q61-\-)~ \oq(~~~j:) 109 ~~:I~-:) c O.30IOZQQQ51 =.;( K::a\OiO~O ct.. -:: O.&'l= k(OHJ~ ~ (,-::a \0 I 00\) fl ':1 '2r If Ii J" '"1-2 : ~. '.J\D = "'lOH' •.. 3.In ep 0 0 - n s vs t lrstor er ,we avenoted thatthe slopeoftheplot isindependent 2 ofthe Beer's law constant forthe dye. How doesthe slope, q, obtained fromplotting 1/Abs vs t dep,fndonth~eer's law\~tstant~for~e&nd
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