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Biology and Chemistry Homework Help
Creating a buffer out of 0.100M solutions
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[QUOTE="JwdePhysics, post: 6124713, member: 639029"] [h2]Homework Statement [/h2] The questions asks which of the following would make a buffer given that all solutions are 0.100M and you have solutions of acetic acid, sodium hydroxide, and hydrochloric acid. [LIST=1] [*]20.00mL of each solution is mixed. [*]20.00mL of acetic acid and 30.00mL of NaOH are mixed [*]30.00mL of acetic acid and 20.00mL of NaOH are mixed [*]20.00mL of acetic acid and 20.00mL of NaOH and 10.00mL of HCL are mixed. [/LIST] [h2]Homework Equations[/h2] None necessary [h2]The Attempt at a Solution[/h2] So I know that 2. is wrong because once all the acetic acid and NaOH are mixed, there will be 10 mL left of a strong base which is not a buffer. I know 3 is right because 30.00mL of acetic acid added to 20.00mL of NaOH will leave 10.00mL plus some base when the NaOH reacts so that creates a buffer. However I am not sure how to solve 1 and 4 with 3 solutions each. Does anyone have any advice for determining if 1 and 4 are right? [/QUOTE]
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Creating a buffer out of 0.100M solutions
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