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
Makovka662 [10]
3 years ago
9

Why is flameless heating used for heating a solution in hexane or diethyl ether during a recyrstallization?

Chemistry
1 answer:
kkurt [141]3 years ago
6 0

The technique which is used to purify the chemicals is said to be recrystallization.

In this process, solute is dissolved in a particular solvent and according to its principle, the quantity of solute which is dissolved by solvent increases with increase in temperature. The solutes are more soluble at high temperatures in comparison to room temperature (insoluble) or low temperature. Therefore, heating is needed to dissolve the solute in the solvent.

Now, in the case of hexane or diethyl ether, flameless heating is required because of their low boiling points implies if they heat directly on fire, then they have tendency to catch fire. Thus, hexane and diethyl ether are highly flammable.

You might be interested in
After oil is naturally refined underground, the only way that a viable deposit of hydrocarbons can form is if the oil encounters
Arisa [49]
After oil is naturally refined underground, the only way that a viable deposit of hydrocarbon can form is if the oil encounters some kind of trap.
8 0
3 years ago
A 250. ML sample of 0.3M HCl is partially neutralized by the addition of 100. ML of 0.25M NaOH.Find the concentration of hydroch
GuDViN [60]

Answer:- 0.143 M

Solution:- HCl and NaOH reacts in 1:1 mol ratio as shown in the below reaction:

HCl(aq)+NaOH(aq)\rightleftharpoons NaCl(aq)+H_2O(l)

Let's calculate the initial moles of HCl and the moles of NaOH added to it:

250.mL(\frac{1L}{1000mL})(\frac{0.3molHCl}{1L})

= 0.075 mol HCl

100.mL(\frac{1L}{1000mL})(\frac{0.25molNaOH}{1L})

= 0.025 mol NaOH

Since they react in 1:1 mol ratio, 0.025 mol of NaOH will react with 0.025 moles of HCl.

Remaining moles of HCl = 0.075 - 0.025 = 0.050

Total volume of the solution = 0.250 L + 0.100 L = 0.350 L

So, the concentration of HCl in the resulting solution = \frac{0.050mol}{0.350L}

= 0.143 M

Hence, the concentration of HCl acid in the resulting solution is 0.143 M.

5 0
3 years ago
If objects at the same distance suddenly decreased in mass the gravitational force between them would
Flauer [41]

Answer:

Gravitational force is also decreases.

Explanation:

Gravitational force is directly proportional to the mass of an object and inversely properly to the distance between their centres. Directly means if one increases the other automatically increases or if one decreases, the other also decreases. There is a direct relationship between mass and gravitational force so if mass of the bodies decrease, the gravitational force is also decreases.

7 0
3 years ago
Which type of volcano forms when eruptions contain mostly dush ashes and cinders?
Alisiya [41]
Stratovolcanoes, or composite volcanoes, mostly erupt dust, ash, and cinders.
6 0
3 years ago
Which of the following organisms would likely be found on a decaying deer carcass (dead deer)?
TEA [102]

Answer:

c. bacteria and fungus

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which reaction occurs spontaneously?
    12·2 answers
  • Help with my science
    9·1 answer
  • If 7.83 g of H 2 is reacted with 15.7 g of O 2 in the reaction 2H2 + O2 → 2H2O , what is the limiting reagent?
    14·1 answer
  • What was the new theory that was developed of the continental drift?
    14·1 answer
  • Cassie's older sister is really good at gymnastics, so Cassie knows she will never be as good. Whenever she goes to gymnastics p
    10·1 answer
  • Please help I will reward brainly
    11·2 answers
  • You are throwing an object with a force of 140 N. The object accelerates 19.0 m/s/s. What is the mass of the object?
    7·1 answer
  • A sample of a compound containing only carbon and hydrogen was burned to produce 1.36g of water and 5.22g of carbon dioxide. Cal
    15·1 answer
  • The color of a star could give hints to<br><br> mass<br> temperature<br> brightness<br> density
    10·2 answers
  • Write the symbol for every chemical element that has atomic number less than 13 and atomic mass greater than 17.2 u.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!