Each mole of NaOH releases one mole of Na+ ions and one mole of OH- ions.
Each mole of a substance contains 6.02 x 10²³ particles
Moles of NaOH = concentration x volume
Moles of NaOH = 0.4 x 1 = 0.4
Moles of Na+ = 0.4
Ions of Na+ = 6.02 x 10²³ x 0.4 = 2.41 x 10²³
Moles of OH- = 0.4
Ions of OH- = 6.02 x 10²³ x 0.4 = 2.41 x 10²³
D. 0.36 g
When a gas is collected over water, the total pressure is the sum of the pressure of the gas and the pressure of the water vapor.
Ptotal = Pwater + PN₂
PN₂ = Ptotal - Pwater = 730 torr - 23.76 torr = 706 torr
We can find the mass of N₂ using the ideal gas equation.
anode: SO4^2- =SO4+ 2e-
cathode: Cu2+ + 2e- = Cu(s)