Answer:
pH = 1.6
Explanation:
- HF + H2O ↔ H3O+ + F-
- 2H2O ↔ H3O+ + OH-
- Ka = ( [ H3O+ ] * [ F- ] ) / [ HF ]
mass balance:
1 M = [ HF ] + [ F- ].........(1)
charge balance:
[ H3O+ ] = [ F- ] + [ OH- ]......[ OH- ] : comes from water, therefore it is negligible.
⇒ [ H3O+ ] = [ F- ]...........(2)
(2) in (1):
1 M = [ HF ] + [ H3O+ ]
⇒ [ HF ] = 1 - [ H3O+ ].........(3)
(2) and (3) in Ka:
⇒ Ka = [ H3O+ ]² / ( 1 - [ H3O+ ] )
∴ Ka = 7.0 E-4.......from literature
⇒ [ H3O+ ]² + 7.0 E-4[ H3O+ ] - 7.0 E-4 = 0
⇒ [ H3O+ ] = 0.0261 M
⇒ pH = 1.6
D. In forward-biased setup, large numbers of charge carriers will be pulled across the junctions and result in a large current
The answer ispotassium (K)
Matter is anything that has mass and occupies space, It can exist in 3 states, or phases: solid, liquid, and gas.
Solid molecules are closely packed together and retain a fixed shape.
Liquid molecules aren't packed very closely, and take the shape of the bottom of the container.
Gas molecules are far apart and fill the container
completely.
Answer:troposphere
Explanation:The troposphere is the layer that holds 80 percent of the total gas in the atmosphere.
