What is the purpose of checks and balances in the constitution? they would keep any one branch from having too much power. they would give the president power over matters related to money. they would allow states to have equal power with the federal government. they would give federalists and anti-federalists equal power.

The checks and balances in the Constitution keep any one branch from having too much power. For example, the Executive branch chooses Judicial judges, but Congress has to approve those judges. The Executive branch can veto a bill, but Congress can override the veto with if a certain amount of people vote yes. These are just a few of the checks and balances in the Constitution. 
Hope this helps! Please let me know if I'm wrong :)

So no branch would become too powerful

I'm pretty sure that's called a volcano