How does reducing the temperature of chemical reaction affect the rate at which it occurs?

Chemistry

2 answers:

Licemer1 [7]3 years ago

6 0

Answer:

When you lower the temperature, the molecules are slower and collide less. That temperature drop lowers the rate of the reaction. When you increase the pressure, the molecules have less space in which they can move. That greater density of molecules increases the number of collisions.

Explanation:

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Dafna11 [192]3 years ago

5 0

The lower the temperature the slow molecules move which means the reaction would slow and vice versa an increased temp would result in an increase reaction time

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Read 2 more answers

A bromodichlorobenzene which gives four signals in the broadband proton-decoupled 13C spectrum could be:

irga5000 [103]

Answer:

See explanation

Explanation:

In this question, we can have several possibilities for the bromodichlorobenzene that depends on the position of the Br and Cl in the benzene. Our options are:

a) 2-bromo-1,3-dichlorobenzene

b) 1-bromo-2,4-dichlorobenzene

c) 1-bromo-2,3-dichlorobenzene

d) 1-bromo-2,3-dichlorobenzene

e) 4-bromo-1,2-dichlorobenzene

See figure 1

Now, if only have 4 signals, we will have only 4 different types of carbons. In benzene we have 6 carbons, therefore, we will have symmetry in the molecule and some of the carbons would be equivalent. The only molecule that has symmetry is "2-bromo-1,3-dichlorobenzene" because we have several carbons with the same neighbors (see figure 2).

Finally, to check the molecule we can check the 13C NMR for 2-bromo-1,3-dichlorobenzene and we will see that only have 4 signals (see figure 3)