Describe how you would prepare the following aqueous solutions?
Let’s learn describe how you would prepare the following aqueous solutions. The most accurate or helpful solution is served by Yahoo! Answers.
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Best solution
a. 0.100 M K2CrO4 from solid K2CrO4 b. 0.100 M K2CrO4 from 1.75 K2CrO4 stock solution
Answer:
0.100 M = moles / 2.00 moles K2CrO4 = 0.200 194.19 g/mol x 0.200 mol =38.8 g of K2CrO4 + enought water...
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Other solutions
You have to prepare a pH 3.50 buffer, and you have the following .10M solutions available: HCHO2, HC2H3O2, H3PO4, NaCHO2, NaC2H3O2, and NaH2PO4. Which solutions would you use? How many milliliters of each solution would you use to make approximately...
Answer:
Ka of HCH2O = 1.8 x 10^-4 pKa = - log Ka = 3.74 3.50 = 3.74 + log [CHO2-] / [HCO2H] 10^-0.24 =0.575...
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Answer:
The pH of the buffer is given by the Henderson - Hasselbalch equation: pH = pKa + log ([salt]/[acid...
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Answer:
394 g of 19.0 mass %HCl Weight of HCl = 19*394/100=74.86 g of HCl Weight of water= 394-74.86= 319.1...
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-10x^2+4x-14=0 What is the value of the discriminant? Which one of the statements below is correct? A. The equation has two imaginary solutions. B. The equation has two real solutions. C. The equation has one real solution.
Answer:
a = -10 b = 4 c = -14 The discriminant is b^2 - 4ac. I'll assume you can operate a calculator and can...
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14x^2+5x-8=0 I need the value_______ a) the equation is 2 real solutions b) one real solution c) 2 imaginary solutions. Thanks so much!!
Answer:
For the standard quadratic equation ax² + bx + c = 0, the solutions are [-b + √(b² ...
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Which of the following conditions is necessary for the development of a hurricane? warm, moist air warm ocean waters mild winds in the upper atmosphere all of the above Which of the following would most likely result in a flash flood? an ice storm melting...
Answer:
Here are the answers to the multiple choice questions. 1. All of the above 2. Excess precipitation in...
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Prepare a solution containing both K+ and Na+ in which [K+] : [Na+] is > 1. Similarly, prepare a second solution in which [Na+] : [K+] is > 1. Do a flame test on each. 2.1. Describe the preparation of each solution. 2.2. Describe flame test results...
Answer:
This is just bucket chemistry. If I assume I'm starting with KCl and NaCl crystals and dissolving them...
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Prepare 100mL each of .2M sodium carbonate and .2M sodium hydrogen carbonate solutions from anhydrous solids; later, use each of these to prepare 100 ml of the corresponding .02M solution. Describe the process of making each of these solutions. I have...
Answer:
OK--the molecular weight of sodium carbonate is 105.9884 g/mol. Multiply this value by 0.2 to get grams...
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You have to prepare a pH 5.00 buffer, and you have the following 0.10 M solutions available: HCOOH HCOONa CH3COOH CH3COONa HCN NaCN Which solutions would you use?
Answer:
Use Acetic acid and Sodium Acetate. This is a weak acid and it's salt, which are the ingredients to...
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