i_like_sun Posted May 6, 2007 Posted May 6, 2007 Ka for the weak acid, HA, is 4.7 x 10-7 at a certain temperature. Calculate the pH of a buffer solution made by mixing 67.2 mL of 0.138 M HA with 31.4 mL of 0.183 M NaA at this temperature. Assume that the volumes of the solutions are additive. Anyone up to the challenge??????? C'mon, dont' be a wussy! Quote
kevbone Posted May 6, 2007 Posted May 6, 2007 Ka for the weak acid, HA, is 4.7 x 10-7 at a certain temperature. Calculate the pH of a buffer solution made by mixing 67.2 mL of 0.138 M HA with 31.4 mL of 0.183 M NaA at this temperature. Assume that the volumes of the solutions are additive. Parden me for being a complete idiot....but what the hell does this mean? Quote
i_like_sun Posted May 6, 2007 Author Posted May 6, 2007 Fuck. I got the WRONG answer..... I calculated a PH of 7.05 The right answer is 6.12 I suck. Quote
AlpineK Posted May 7, 2007 Posted May 7, 2007 If you want to make bank I'd suggest getting into the crystal meth business All I know about PH is trees like acidic soils... but not too acidic. Quote
i_like_sun Posted May 7, 2007 Author Posted May 7, 2007 Ka for the weak acid, HA, is 4.7 x 10-7 at a certain temperature. Calculate the pH of a buffer solution made by mixing 67.2 mL of 0.138 M HA with 31.4 mL of 0.183 M NaA at this temperature. Assume that the volumes of the solutions are additive. Parden me for being a complete idiot....but what the hell does this mean? No worries Kev, apparently I'm a complete idiot too! This whole problem means precisely this: only people with small penises and piercing reptilian eyes are good at chemistry problems! Those losers ....... Quote
minx Posted May 7, 2007 Posted May 7, 2007 you know there are plenty of online calculators to do this problem for you. you'll never actually have to do this in the real world. i suggest you remind your chemistry prof of this. Quote
kevino Posted May 7, 2007 Posted May 7, 2007 (edited) We just finished pH of a buffer solution! Awesome dude! After looking at it, can't you just use the henderson-hasselback equation: pH=-log(Ka)+log(base/acid) Edited May 7, 2007 by kevino Quote
i_like_sun Posted May 7, 2007 Author Posted May 7, 2007 Some REALLY bad new teacher, who I'm sure has a major problem with Ephedra use...... How do you say JITTERS???? Quote
fenderfour Posted May 7, 2007 Posted May 7, 2007 I usually just say "jitters" you could try this LINK if you need something more. Quote
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