Homework Answers
The pH will be almost the same.
Only 0.01 M HNO3: pH = -Log[H+] = -Log(0.01) = 2
Mixture of 0.01 M HNO3 and 0.04 M KNO3 in water: pH = 2
Explanaiton: KNO3 salt is neutral, which contributes [H+] = 10-7 M
i.e. [H+]total= (0.01 + 10-7) M
i.e. pH = -Log(0.01 + 10-7) ~~ 2
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6. You prepare two solutions in the lab. One contains 0,010 M HNO in DI water. The other contains 0.010 M HNO3 and...
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6) Two solutions are prepared. The first contains glucose (C,H,O) dissolved in water at 0.180 M...
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Procedure:
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Lab 2A:
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size and weight of the potato pieces.
To measure changes in size, you will need either a gram scale
(like a food scale) or a millimetre ruler. It is best if you have...
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Please help with the prelab questions! thank you!!!!
Especially 2 and 3!
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The beaker in the illustration below contains two solutions of salt with different concentrations (measured by molarity, M). The two solutions are separated by a membrane that is permeable to both salt and water. A 0.2 M0.9MB 0.2 M salt Biology: How Life Works, Second Edition O2016 W.H. Freeman and Company Which of the following will you observe immediately in this container? Net diffusion of water across the membrane, but not of salt. Net diffusion of water from B to...
6) Two solutions are prepared. The first contains glucose (C.H.O.) dissolved in water at 0.180 M concentration. The second contains 13.0 grams of MgCl, in water, with a total volume of 1.77 Liters. (MgCl, = 95.21 g/mol) a) Calculate the Molarity concentration of of the MgCl, solution: b) Calculate the osmolarity concentration of both solutions: 12) Which solution would you predict to have the highest boiling point? (2)
calculate the theoretical ph of solution F and N.
MLIM HNO, solution 260 ml. De water 30 mL 0.1 M NaOH solution PROCEDURE The pH meter should already be calibrated at pH 4, 7 and 10. If your pH meter appears not to be operating properly, notify your TA and they will recalibrate the meter. Please handle the pH probe carefully the tip is made of a fragile glass membrane. Be sure to rinse the probe with water and blet...
6) Two solutions are prepared. The first contains glucose (C,H,O) dissolved in water at 0.180 M concentration. The second contains 13.0 grams of MgCl, in water, with a total volume of 1.77 Liters. (MgCl, = 95.21 g/mol) a) Calculate the Molarity concentration of of the MgCl, solution: b) Calculate the osmolarity concentration of both solutions: c) Which solution would you predict to have the highest boiling point? 수 XCEO
You will prepare two of the buffer solutions used in this lab. They are the 0.1 M CHaCOOH/CH3COONa buffer at pH- 4.74 and at pH-6. You will need to write your own procedure for the preparation of these buffers. To write the procedure, study the manual and follow the pre-lab questions. Using Henderson-Hasselbach equation to calculate the ratio of [CH,COONa/[CH COOH] for each buffer and write your answers in the table on the right. Show calculations: 1. 2. You just...
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This is from a Study of Buffer Solutions and pH of Salt
Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value
larger than the standard value?
Procedure:
10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
Lab 2A:
Introduction
In this lab, you will be studying osmosis across the membrane of
potato cells. You will create equal-sized pieces of potato and then
place the pieces in solutions with differing concentrations. You
will then, over time, measure any changes that take place in the
size and weight of the potato pieces.
To measure changes in size, you will need either a gram scale
(like a food scale) or a millimetre ruler. It is best if you have...
Please help with the prelab questions! thank you!!!!
Especially 2 and 3!
Pre-Lab Questions 1. Calculate the theoretical equivalence point (the volume!) in terms of ml NaOH adde each of the titrations. Assume the concentration of acid is 0.81 M and the concentration of base is 0.51 M. 2. Which equation can be used to find the pH of a buffer? Calculate the pH of a buffer containing 0.20 M CH3COOH and 0.20 M CH3COONa. What is the pH after...
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