Will surface area have an effect on the rate of reaction between:
- two gases
- a positive ion and a negative ion, both in aqueous solution
- a solid and a gas
Explain each answer.
two gases: No – gases mix so thoroughly that all molecules may contact
all other molecules
a positive ion and a negative ion, both in aqueous solution: No – ions in
aqueous solution mix so thoroughly that all molecules may contact all
a solid and a gas: Yes – increasing surface area of the solid should
increase the reaction rate. Since gases and solids do not mix together, the
only place they can react is at the surface of the solid where the solid and
gaseous species meet
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