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anygoal [31]
3 years ago
13

You may have to recrystallize any or all of the components of your extraction mixture, benzoic acid, ethyl-4-aminobenzoate and f

luorenone, depending on their purity after isolation. You should have the recystallization solvents in your protocol. They are respectively:
Chemistry
1 answer:
hjlf3 years ago
6 0

Answer:

the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

Explanation:

Recrystallization is simply a technique used to purify an impure compound in a solvent.

Now, we want to purify the mixture of benzoic acid, Ethyl-4-aminobenzoate and fluorenone.

For the benzoic acid, it can be separated out of the mixture by addition of sodium hydroxide base (NaOH).

The Ethyl - 4 - aminobenzoate will be separated from the mixture by the addition of Hydrochloric Acid (HCl).

The fluorenone would be separated out by heating the mixture in a sand bath after the basic and acidic components have already been extracted out.

Thus, the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

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If a balloon is expanded from 0.055 l to 1.403 l against an external pressure of 1.02 atm, how many l⋅atm of work is done?
Ahat [919]
Work for a irreversible reaction, in thermodynamics, is calculated by multiplying the external pressure with the change in volume. Therefore,

Work = P ( V2 - V1 )
Work = 1.02 (1.403 - 0.055)
Work = 1.375 L-atm

Hope this answers the question. Have a nice day.
8 0
3 years ago
What is acid precipitation?
zimovet [89]

Explanation:

precipitation like snow rain with increased acid is know as acid precipitation

6 0
3 years ago
HCl(?) + H2O(?) → H3O+(?) + Cl-(?) <br><br> What is the phase label on Cl-?
viva [34]

Answer:

H30,+ion is known as Hydroniom Ion

Explanation:

brain ly ----

everyday

brainless this answer is correct

6 0
3 years ago
Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —&gt; 2H
gavmur [86]

Answer:

4 × 10 g

Explanation:

Step 1: Write the balanced equation

2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)

Step 2: Calculate the moles corresponding to 4 g of H₂

The molar mass of H₂ is 2.02 g/mol.

4 g × 1 mol/2.02 g = 2 mol

Step 3: Calculate the moles of H₂O produced from 2 moles of H₂

The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.

Step 4: Calculate the mass corresponding to 2 moles of H₂O

The molar mass of H₂O is 18.02 g/mol.

2 mol × 18.02 g/mol = 4 × 10 g

7 0
3 years ago
0.000000655 mL in scientific notation
alina1380 [7]

Answer:

<u>The answer is 6.55 * 10⁻⁷</u>

Explanation:

Let's write 0.000000655 mL in scientific notation:

The first step is you have to move the decimal place until you have a number between 1 and 10. If you keep moving the decimal point to the right in 0.000000655 you will get 6.55.

Now, the second step is you count how many places you moved the decimal point. You moved it 7 places to the right to change 0.000000655 to 6.55.

Finally, You need to show that you moved the decimal point 7 places to the right by noting that the number should be multiplied by 10⁻⁷ because a power of ten with a negative exponent, such as 10⁻⁷, means the decimal was moved to the right.

<u>The answer is 6.55 * 10⁻⁷</u>

3 0
4 years ago
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