Chem Exam 3 Things to Know 100% Verified Review Solution 2024/2025
Chem Exam 3 Things to Know 100% Verified Review Solution 2024/2025 Before starting a titration equation, what do we need to find? - ANS-Ka/Kb (given the other), volume, concentration of acid and base, initial mols of weak acid/base at the starting point of a titration, how do you find pH? - ANS-use a RICE table to find K expression equation, plug initial (not titrant) concentration into table and when you have K expression, solve for X. take -log of x for pH at the buffer region of a titration, how do you find pH? - ANS-RICF table, use mols initial for solution and use concentrationXvol added for titrant to plug into inventory table. then subtract smallest amount and plug into HH which is pH=pKa+logB/A at the halfway point of a titration, how do you find pH? - ANS-pH=pKa at equivalence point of titration, how do you find pH? - ANS-mols acid=mols base, so put mols over total volume of solution to find concentration of titrant. then plug into shortcut equation (squareroot of K*[titrant]). this K value will be the opposite of what is used in starting point at error region, or post equivalence, how do we find pH? - ANS-multiply initial molarity of titrant by volume added SINCE equivalence. that will give you mols of titrant added since equivalence, which we will then divide by the total volume to get molarity since equivalence . take -log of that to get pH if you are asked to find the maximum volume that can be added before a buffer capacity is exceeded, what do you do? - ANS-multiply volume of conjugate by concentration of conjugate to get mols of conjugate. then set that over L and equal to titrant concentration to solve for max volume if you are given pKa and pH and asked to find ratio of acid to base, what do you do? - ANS-plug them into henderson hasselbach which is pH= pKa + logB/A if Qsp is less than Ksp, the solution is... - ANS.. Continues...
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- Subido en
- 24 de abril de 2024
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- 11
- Escrito en
- 2023/2024
- Tipo
- Examen
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