would you show me the step by step to solve this problem, thank you so much
Homework Answers
Ka = 1.8*10^-5
pKa = - log (Ka)
= - log(1.8*10^-5)
= 4.745
use formula for buffer
pH = pKa + log ([CH3CO2Na]/[CH3CO2H])
5.0 = 4.7447 + log ([CH3CO2Na]/[CH3CO2H])
log ([CH3CO2Na]/[CH3CO2H]) = 0.2553
[CH3CO2Na]/0.2 = 1.8
[CH3CO2Na] = 0.36
volume , V = 5*10^2 mL
= 0.5 L
use:
number of mol,
n = Molarity * Volume
= 0.36*0.5
= 0.18 mol
Molar mass of CH3CO2Na = 82 g/mol
use:
mass of CH3CO2Na,
m = number of mol * molar mass
= 0.18 mol * 82 g/mol
= 14.8 g
Answer: c
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would you show me the step by step to solve this
problem, thank you so much...
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7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper signif...
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(3) (4) B) Preparation a) Place about 50 ml of distilled water in a 0.1 liter volumetric flask. b) Use a 1 ml pipette to transfer 0.83 ml of conc. HCl to the flask. Add distilled water until the volume is 0.1 liter. Save for later use. Prepare 0.1 liter of 0.1 M sodium hydroxide (MW= 40.0 (skip this exercise)). A) Calculations B) Preparation Prepare 0.1...
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Hi, please can you show me how to work 5a) and 5b) out. The Ka
value is 1,8*10^-5. Thank you.
eai 5. A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH,Co, to 250 cm'of 0.150 M acetic acid, CH COOH. Ka ,s S (a) What is the pH of the buffer? (b) What is the pH of 100 ml of buffer solution if you add 82 mg of NaOH to the solution? 1201
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
Please show a step by step process of how
to get Part B. Thank You!
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Please answer all the questions. thank you.
Worksheet 4. Which solution in above table has composition of an ideal buffer? The buffer in this experiment is made of acetic acid HCH.O and sodium acetate NaCHO. (CHO). Ka=1.76 x 10 for HCH:02 Each buffer composition is listed in the table below. 5. If the buffer is mainly used to neutralize added acid (H'), which buffer solution would be most effective? Please explain Test Tube Number Table 1 Solution Reference (Acetic acid)...
can you please write the calculations with clear
writing and explanations and thank you
(3) (4) B) Preparation a) Place about 50 ml of distilled water in a 0.1 liter volumetric flask. b) Use a 1 ml pipette to transfer 0.83 ml of conc. HCl to the flask. Add distilled water until the volume is 0.1 liter. Save for later use. Prepare 0.1 liter of 0.1 M sodium hydroxide (MW= 40.0 (skip this exercise)). A) Calculations B) Preparation Prepare 0.1...
9. Explain as much as you can! I alreadyknow the answer, but
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sp (9) Calculate the pH of a buffer solution that contains 0.820 grams of sodium acetate and 0.010 moles of acetic acid in 100 ml of water. The Ka of acetic acid is 1.77x10
D. Buffers 1. A buffer solution was made by dissolving 10.0 grams of sodium acetate in 200.0 mL of 1.50 M acetic acid. Assuming the change in volume when the sodium acetate is added is not significant, estimate the pH of the acetic acid/sodium acetate buffer solution. The K, for acetic acid is 1.8 x 105. 2. Calculate the pH of a buffer solution that initially consists of 0.0400 moles of ammonia and 0.0250 moles of ammonium ion, after 20.0...
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