A SOLUTION OF 0.05METER ACID PKA 6.10 IS MIXED WITH AN EQUAL VALUE 0.1 SODIUM SOLUTION OF SODIUM SALT WHAT IS THE PH OF THE FINAL MIXTURE.

Answer 1

1.3

Answer 2

Surely you don't mean "meter" acid. Surely you mean molar.
Use the Henderson-Hasselbalch equation.
pH = pKa + log (base/acid).