Sodium sulfate 10hydrate, Na subscript 2 SO subscript 4 times 10 straight H subscript 2 straight O , dehydrates according to the equation Na subscript 2 SO subscript 4 times 10 straight H subscript 2 straight O open parentheses straight s close parentheses rightwards harpoon over leftwards harpoon Na subscript 2 SO subscript 4 open parentheses straight s close parentheses plus 10 straight H subscript 2 straight O open parentheses straight g close parentheses space straight K subscript straight p equals 4.08 cross times 10 to the power of negative 25 end exponent space at space 25 degree space straight C . What is the pressure of water vapor at equilibrium with a mixture of Na subscript 2 SO subscript 4 times 10 straight H subscript 2 straight O space and space NaSO subscript 4 ? 4.08 cross times 10 to the power of negative 25 end exponent space a t m 3.64 cross times 10 to the power of negative 3 end exponent space a t m 6.39 cross times 10 to the power of negative 13 end exponent space a t m 3.64 cross times 10 to the power of negative 5 end exponent space a t m