You need to take a medicine orally and want quick action. The medicine is availa
ID: 967637 • Letter: Y
Question
You need to take a medicine orally and want quick action. The medicine is available in the form of a compressed tablet or as a loose powder. Which form would give you the desired quick action? Why? Some reactions require an additional chemical in a non-stoichiometric amount In order to catalyze the reaction. Mow docs a catalyst promote a reaction? Which reaction will be faster? Explain your choice, Below is an equation that describes the rate of reaction between reagents A and B. where k is a constant. IA| is the concentration of A in moles per liter, and IB] is the concentration 0$ B in moles per liter. What happens to the rate if the concentration of A is doubled? What happens to the rate if the concentration of B is doubled? What happens to the rate if the concentrations of both A and B are doubled?Explanation / Answer
1) The powder does because it's already broken down. Mix it with water and it's pretty much a slurry/liquid which means it can be absorbed faster.
The tablet must be broken down by stomach acids (which take time).
2) Catalysts increase the rate of reaction without being used up. They dothis by lowering the activation energy needed. With a catalyst, more collisions result in a reaction, so the rate of reaction increases. Different reactions need different catalysts.
3) For a reaction to take place to molecules need to collide with enough energy to overcome the energy barrier at the correct orientation, right? If you're not sure about this look up collision theory. The ions in aqueous solutions are already floating around and ready to react and the solution means that there is space for them to whizz around in. In covalent molecules you have to break the old bonds before you make the new ones and this takes energy and therefore less of the collisions that happen are likely to have enough energy to react.
so 1st reaction takes place faster .
4) a) Rate is doubled.
b) Rate is doubled.
c) Rate will be constant if both the concentrations are doubled
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