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State one chemical difference between OH in alkanols and OH in inorganic base
Show the condensation reactions between the following carboxylic acids and alcohols, using the structural formulas of the reactants and products
- ethanoic acid + 2-propanol
- ethanoic acid + 1-pentanol
- butanoic acid + ethanol
- butanoic acid + 2-propanol
How many grams of oxygen are in 3.01x10^23 particles of glucose
- Suppose that you had added solid sodium hydroxide pellets to hydrochloric acid, instead of adding hydrochloric acid to sodium hydroxide solution;
(a) Do you think you would have obtained a different enthalpy change?
(b) Would the enthalpy change have been higher or lower?
(c) How can you test your answer?
(d) What change would you need to make to the thermochemical equation if you perform the investigation using solid sodium hydroxide?
Why do cells need to store glucose in the form of glycogen and what is the structural advantage of glycogen for animals as compared to either amylose or amylopectin?
What is the formal charge in Nitrogen in N(CH3)4?
1) The structure of benzoic acid is shown below. pKa = 4.2 If one chose to recrystallize this compound from water would pH make a difference in the effectiveness of the recrystallization. Explain using words and pictures.
In Water:
0 degrees Celsius 25 degrees Celsius 100 degrees Celsius
0.0017 g/ml 0.00344 g/ml 0.05613 g/ml
In Cyclohexane
0 degrees Celsius 25 degrees Celsius 100 degrees Celsius
0.0062 g/ml 0.0086 g/ml 0.0869 g/ml
1) A chemist need to separate benzoic acid from 4-hydroxybenzoic acid. The mixture is thought to contain 5.00 grams of benzoic acid and 1.00 grams of 4-hydroxybenzoic acid. Water is the intended recrystallization solvent.
a. What is the minimal amount of water needed for the recrystallization? Show all calculations and explain your thinking. The objective is to get pure benzoic acid.
b. What is the maximum recovery of benzoic acid in grams?
1) Suppose the impurity in my sample of impure benzoic acid is salt, and in a 9.8 g sample there is actually 1 gram of salt. If I were to use 160 mLs of water in my recrystallization would it be likely for my recrystallized sample to contain any salt. The solubility of sodium chloride in water is .360 g/mL at 0 0 C and .380 g/mL at 100 0C. Show all your calculations. Remember to consider significant figures in your final answers. Label all units
Could you re do the previous question on how to write a multi step synthesis of ethyl ethanoate starting from ethanol and ethanal with clear notes
