1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irga5000 [103]
2 years ago
7

During the procedure, several wases with cold methanol were done. why was it important to use cold methanol? (In nitration of me

thyl benzoate)
Chemistry
1 answer:
pantera1 [17]2 years ago
3 0

The use of cold methanol is important because it is used to recrystallize or solidify the product.

Since, ice bath is also used in nitration of methyl benzoate because in this reaction the concentrated acid like sulfuric acid is used with water and it is very exothermic.

The formation pure solid from the impure solid compound by mixing with hot solvent and form saturated solution. Now, this solution as cools and pure crystal grows when solubility of the compound decreases. This whole process is called re-crystallization.

learn about re-crystallization

brainly.com/question/14918321

#SPJ4

You might be interested in
A column is packed with 0.5 g of a strongly acidic ion exchange resin in H+ form. A 1.0 M NaCl solution is passed through the co
Lena [83]

Answer:

The correct answer is 17 meq/g

Explanation:

Ion exchange capacity (IEC) express the total of active sites of a resin in which ions are attached because the greater molecular weight.

The exchange Reaction can be represented as

R-HR-H^{+} +  Na^{+} + Cl^{-} -> R-Na^{+} + HCl_{aq}

The IEC value (in meq/g) is determinated by using the next equation:

IEC=[(mL of NaOH)*(M of NaOH)]/mass of resin

IEC [(17 mL)*(0.5 M)/0.5]= 17 meq/g

3 0
4 years ago
How do you rank the states of matter from highest to lowest in kinetic energy
Semmy [17]
Plasma, Gas, Water, Solid
4 0
4 years ago
A 250.0 mL sample of aqueous solution contains an unknown amount of dissolved NaBr. Excess aqueous Pb(NO3)2is then added to this
Scrat [10]

Answer:

A. 0.0655 mol/L.

B. PbBr2.

C. Pb2+(aq) + Br- --> PbBr2(s).

Explanation:

Balanced equation of the reaction:

Pb(NO3)2(aq) + 2NaBr(aq) --> PbBr2(s) + 2NaNO3(aq)

A.

Number of moles

PbBr2

Molar mass = 207 + (80*2)

= 367 g/mol.

Moles = mass/molar mass

= 3.006/367

= 0.00819 mol.

Since 2 moles of NaBr reacted to form 1 mole of PbBr2. Therefore, moles of NaBr = 2*0.00819

= 0.01638 moles of NaBr.

Since, the ionic equation is

NaBr(aq) --> Na+(aq) + Br-(aq)

Since 1 moles of NaBr dissociation in solution to give 1 mole of Br-

Therefore, molar concentration of Br-

= 0.0164/0.25 L

= 0.0655 mol/L.

B.

PbBr2

C.

Pb(NO3)2(aq)--> Pb2+(aq) + 2No3^2-(aq)

2NaBr(aq) --> 2Na+(aq) + 2Br-(aq)

Net ionic equation:

Pb2+(aq) + 2Br- --> PbBr2(s)

8 0
3 years ago
Among these processes, which is the slowest chemical reaction? digesting food boiling an egg tarnishing of silver melting of a g
Lunna [17]

Answer:

The tarnishing of silver.

Explanation:

6 0
4 years ago
Read 2 more answers
How many moles of H2O are produced form 2.11 mole of oxygen?
aivan3 [116]

Answer:

4.22 mol H₂O

Explanation:

Step 1: Write the equation for the synthesis of water

2 H₂ + O₂ ⇒ 2 H₂O

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to H₂O is 1:2.

Step 3: Calculate the moles of water produced from 2.11 moles of oxygen

We will use the previously established molar ratio.

2.11 mol O₂ × 2 mol H₂O/1 mol O₂ = 4.22 mol H₂O

4 0
3 years ago
Other questions:
  • What happens to acetone molecules when you add heat to a beaker of liquid acetone?
    10·1 answer
  • Adding external protrusions to a wings ( such as fuel pods, water tank, and missiles)would
    8·2 answers
  • In free fall, all objects fall with the same acceleration.<br>O<br>A. True<br>O<br>B. False​
    12·2 answers
  • Number of SO42- ions in 20.4 g Cr2(SO4)3
    5·1 answer
  • 60 grams of ice will require _____ calories to raise the temperature 1°C.
    14·1 answer
  • Many organisms on Earth exhibit similar ____________.
    6·2 answers
  • 7. A human's appendix, wisdom teeth, and a dew claw are
    9·1 answer
  • Examples s name of thosse food items we can store for a month?​
    14·1 answer
  • ..............................................................................................
    11·1 answer
  • The three types of intermolecular forces have different strengths. Rank
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!