A 10 mL volume of a 5 mM lactic acid solution is mixed with 5 mL...
A 10 mL volume of a 5 mM lactic acid solution is mixed with 5 mL of water. What is the concentration of the resulting mixture in
Homework Answers
To calculate this problem, consider the serial dilution formula: Molarity (start) x Volume (start) = Molarity (final) x Volume (final) or M1V1 = M2V2.
- M1= 5mM
- M2= ?
- V1= 10
- V2= 15 ml
Thus, 5×10 = ?× 15 = 3.3 mM
Convert the millmolar into micromolar gives 3300 µM, hence the concentration of the resulting mixture is 3.3 ×103 µM.
Need help on Problem 7 & 8 Vi CI 7. A 10 mL volume of a...
Need help on Problem 7 & 8
Vi CI 7. A 10 mL volume of a 5 mM lactic acid solution is mixed with 5 mL of water. What is the concentration of the resulting mixture in uM? (Remember, CV,=C2V2, where C and V represent the concentrations and volumes of each solution, respectively.) Finaca C2 5avi = Cava (5x10-3) Clomi) = (Ca)(151) 15ml 15ml 8. What volume of water should be added to 7 mL of a 10 mM riboflavin...
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2)250.0 mL of a 0.375 M solution of lactic acid (HC:H:03) is titrated with a solution...
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1) A 20.0 mL sample of lactic acid (monoprotic with Ka = 1.37 x 10-4) requires...
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Need help on Problem 7 & 8
Vi CI 7. A 10 mL volume of a 5 mM lactic acid solution is mixed with 5 mL of water. What is the concentration of the resulting mixture in uM? (Remember, CV,=C2V2, where C and V represent the concentrations and volumes of each solution, respectively.) Finaca C2 5avi = Cava (5x10-3) Clomi) = (Ca)(151) 15ml 15ml 8. What volume of water should be added to 7 mL of a 10 mM riboflavin...
Equal volumes of 200 mM lactic acid and 200 mM potassium lactate are mixed to make a buffer. The pKa of lactic acid is 3.86 (a) Determine the pH of this buffer and its final concentration. [4 marks] (b) Calculate the concentrations of the buffer components after acid or base is added to bring the pH to 4.5. Assume a negligible change in volume. 6 marks]
10) 2.00 mL ofa 0.0500 M CusO, solution is mixed with 2.00 mL of a 0.0100 M solution of K. Ksp (CuF2) 1.61 x 109 a) (7 pts) What is the concentration of Cu (aq) ion in the solution after equilibrium is established? b) (6 pts) Water is added to bring the volume of the solution to 1.00 L, and the mixture is stirred until equilibrium is reestablished. Calculate Q for this mixture. Is all of the CuF2 dissolved?
If you mix 200. ml of a 0.150 M solution of lactic acid with 0.010 moles of solid Ba(OH)2, what is the pH of the resulting solution? You may neglect the volume change from the Ba(OH)2 addition.
2)250.0 mL of a 0.375 M solution of lactic acid (HC:H:03) is titrated with a solution of 0.75 M NaOH. The K, for lactic acid is 1.38 x 104. (22 pts total) a) what is the pH before addition of NaOH? (Hint: what is the relevant equilibrium?) (4 pts) b) what is the total number of moles of acid? (2 pts) c) what volume of the NaOH solution is required to reach the equivalence point? (2 pts) d) what is...
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