Sodium hydride racts with excess water to produce

aqueoussodium hydroxide and hydrogen gas. What mass (in grams) of

sodiumhydride will produce 982 mL of gas at 28.0 C and 765 torr,

when thehydrogen fas is collected above water? The vapor pressure

of waterat this experiment is 28 torr.

Question

Chemistry

Emiliano Stevenson

11 August, 13:34

Sodium hydride racts with excess water to produce

aqueoussodium hydroxide and hydrogen gas. What mass (in grams) of

sodiumhydride will produce 982 mL of gas at 28.0 C and 765 torr,

when thehydrogen fas is collected above water? The vapor pressure

of waterat this experiment is 28 torr.

+1

Answers (1)

Know the Answer?

Marsh · Answer 1

0.96g of sodium hydride

Explanation:

Equation of reaction:

NaH + H20 = NaOH + H2

Mass of hydrogen gas produced (m) = PVM/RT

P = 765torr - 28torr = 737torr = 737/760 = 0.97atm, V = 982mL = 982cm^3, M = 2g/mol, R = 82.057cm^3. atm/gmol. K, T = 28°C = 28 + 273K = 301K

m = (0.97*982*2) / (82.057*301) = 0.08g of hydrogen gas

From the equation of reaction

1 mole (24g) of sodium hydride produced 1 mole (2g) of hydrogen gas

0.08g of hydrogen gas would be produced by (24*0.08) / 2 = 0.96g of sodium hydride

Sodium hydride racts with excess water to produceaqueoussodium hydroxide and hydrogen gas. What mass (in grams) ofsodiumhydride will produce 982 mL of gas at 28.0 C and 765 torr,when thehydrogen fas is collected above water? The vapor pressureof waterat this experiment is 28 torr.

Sodium hydride racts with excess water to produce

aqueoussodium hydroxide and hydrogen gas. What mass (in grams) of

sodiumhydride will produce 982 mL of gas at 28.0 C and 765 torr,

when thehydrogen fas is collected above water? The vapor pressure

of waterat this experiment is 28 torr.