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(a) Write down a balanced chemical equation for polymerization of a w-hydroxy carboxylic acid (HORCO2H)
(b) The following data were obtained during the condensation of 12-hydroxystearic acid at 160.5 degrees C in the molten state by sampling the reactionmixture at various times. The [COOH] was determined for each sample by titrating with ethanloic sodium hydroxide.
t/h
[COOH] / mol dm-3
0
3.10
0.5
1.30
1.0
0.83
1.5
0.61
2.0
0.48
2.5
0.40
3.0
0.34
Determine the rate coefficient for the reaction under these conditions and the order of the reaction. Also suggest whether or not a catalyst was used.
(c) What would be the extent of the reaction after (i) 1h and (ii) 5h?
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If there is the possibilty that the container may rupture if the pressure exceeds 8.0 atm, at what temperature is rupture likely to occur?
Consider the following unbalanced reduction half equation. MnO4-+H=+e- > Mn2++H2O. How many H= are needed for the balanced half-equation.
What weight of A would be removed from the same solution by successive extraction with four portions of 25mL of hexanes? How much hexanes would be required to remove 98.5% of A in single extraction?
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Dilantin is formulated as the sodium salt of phenytoin. Draw the structure of the product on addition of one equivalent of sodium hydroxide to phenytoin.
15.0 moles of gas are in a 5.00L tank at 22.2°C. compute the difference in pressure between CH4 and an ideal gas under these circumstances. The van der Waals constants for CH4 are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol.
Suppose that 24 g of each of the following substances is initially at 25.0^circ C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat?
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