A reaction run at 40 degrees C should run. (a) four times as fast as one run at

Question

A reaction run at 40 degrees C should run. (a) four times as fast as one run at 20 degrees C (b) run half as fast as one run at 20 degrees C (c) run at the same rate as a reaction run at 20 degrees C (d) impossible to know without knowing reaction 2. Which iodate clock reaction would run the fastest one with (a) 0.1 M iodate (b) 2.0 M iodate (c) 1.0 M iodate (d) they should all run at the same rate 3. Which statement is not true about a catalyst (a) They speed up the rate of a reaction (b) They add energy to a reaction (c) They are not used up in a reaction (c) They lower the activation energy of a reaction 4. The speed that a chemical reaction takes place depends on (a) the energy of its products (b) its activation energy (c) whether the reaction is endothermic or exothermic (d) the energy of the final product

Explanation / Answer

1. A reaction run at 40 oC should run,

(a) four times as fast as a run at 20 oC

every ten degrees increase in temperature is known to double the reaction rate.

2. the iodata clock reaction running the fastest is,

(b) 2.0 M iodate

3. Statement not true about a catalyst is,

(b) they add energy to a reaction

4. The speed of a chemical reaction depends upon,

(b) its activation energy

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