Answer:
The starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
Answer:
Terms we might use to describe timbre: bright, dark, brassy, reedy, harsh, noisy, thin, buzzy, pure, raspy, shrill, mellow, strained. I prefer to avoid describing timbre in emotional terms (excited, angry, happy, sad, etc.); that is not the sound quality, it is its effect or interpretation
From Boyle's law the volume of a fixed mass of a gas is inversely proportional to the pressure at a constant absolute temperature. Thus; K = PV Hence; P1V1 =P2V2 0.5 × 24 = 4× P2 P2 = 12/4 = 3 atm Therefore; the pressure will go from 24 atm to 3 atm
Boiling points.............
Answer:
Se explanation below
Explanation:
Here we will use the technique of extraction taking advantange of the different solubilities of Phenol and and Benzoic Acid in the NaOH and and NaHCO₃ solvents (In reality their anions). Notice that phenol does not dissolve in the weak base NaHCO₃ so we can have the solution of phenol and benzoic acid in ether and proceed to extract with this weak base, the phenol will remain in solution in the organic ether solution and the sodium benzoate will go into the water layer.
We then will repeat the extraction procedure to separate the phenol from the organic layer by using NaOH instead.
Benzoic Acid /
Phenol/ Ether ⇒Extract w/ ⇒ Organic Layer = Phenol/Ether
10 % NaHCO₃ Aqueous Layer = Sodium Benzoate
Sodium benzoate ⇒ 10 % HCl to precipitate Benzoic Acid
Filter Precipitate benzoic Acid ⇒ Recrystallize benzoic Acid
Phenol / Ether Extract w/ Organic Layer = Eher
10 % NaOH Aqueous Layer =
Sodium Phenolate
Sodium Phenolate ⇒ 10% HCl to precipitate Phenol Filter Precipitate Phenol ⇒ Recrystallize Phenol
