Benchmark 4D
The Physical Setting: Structure of Matter
Grades 6-8, page 78

The temperature and acidity of a solution influence reaction rates. Many substances dissolve in water, which may greatly facilitate reactions between them.

NSES Content Standard B 
Physical Science: Chemical reactions 
Grades 9-12, page 179 
Chemical reactions can take place in time periods ranging from the few femtoseconds (10**-15 seconds) required for an atom to move a fraction of a chemical bond distance to geologic time scales of billions of years. Reaction rates depend on how often the reacting atoms and molecules encounter one another, on the temperature, and on the properties--including shape--of the reacting species.