No, that's how you get exploited. You get paid 100% of your salary for 100% of your agreed upon time.
If you're then expected to work 200% of the time then you should be paid 200%, with the ability to say no if you don't want to. The actual amount is irrelevant.
If you're then expected to work 200% of the time then you should be paid 200%, with the ability to say no if you don't want to. The actual amount is irrelevant.