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
Answer:
The answer to your question is 8.2 g of TiF₄
Explanation:
Data
Theoretical yield = ?
mass of Ti = 5 g
mass of F₂ = 5 g
Balanced chemical reaction
Ti(s) + 2F₂ (g) ⇒ TiF₄(g)
Process
1.- Calculate the Molar mass of reactants and products
Ti = 48 g
2F₂ = 2( 19 x 2) = 76 g
TiF₄ = 48 + 76 = 124 g
2.- Calculate the limiting reactant
theoretical proportion Ti/F₂ = 48/76 = 0.63
experimental proportion Ti/F₂ = 5/5 = 1
Conclusion The limiting reactant is F₂ because the experimental proportion was lower than the theoretical proportion.
3.- Calculate the theoretical yield using the mass of F₂
76 g of F₂ --------------- 124 g of TiF₄
5 g of F₂ --------------- x
x = (5 x 124) / 76
x = 8.15 g of TiF₄
The volume of the gas is 180.26 L, if there are 63.5 mol of an ideal gas at 9.11 atm at 42.80 °C.
Applying the ideal gas law PV= nRT
After rearranging the aforementioned expression, the volume might then be found as: V= n R T/ P.
Consequently, V= 63.5 mol, 0.0821, 315 K, and 9.11 atm equal 180.26 L.
<h3>How is the ideal gas equation defined?</h3>
The ideal gas equation is PV = nRT. In this equation, P denotes the ideal gas's pressure, V its volume, n its total amount, expressed in moles, and R its resistance for the universal gas constant, and T for temperature.
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Https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/v/stoichiometry-example-problem-2 this should explain
Answer: simple genetic trait
Explanation:unless you have answer choices that would be my answer
