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3 years ago

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

Chemistry

2 answers:

zheka24 [161]3 years ago

8 0

The best way is by heating the solution. The liquid will evaporate leaving the solid, such as salt, behind.

Simora [160]3 years ago

3 0

The best method is to let the water evaporate, unless one wants to recover the water. However, case one would distill the mixture. So the water is still distilled and separated in a different container, as the solid salt remains behind in the distilling flask.

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You are given a 1.00 molal solution of an unknown solute dissolved in water and told that you must determine if the solute is a

aniked [119]

Answer: Yes, the solute is a weak electrolyte

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=(0-(-2.05))^0C=2.05^0C$ = Depression in freezing point

i= vant hoff factor = ?

$K_f$ = freezing point constant = $1.86^0C/m$

m= molality

$\Delta T_f=i\times K_f\times m$

$2.05=i\times 1.86\times 1$

$i=1.10$

As i for non electrolytes is 1, the given compound must be an electrolyte and a weak electrolyte as the value is only slightly greater than 1.

8 0

3 years ago

Match each SI unit to the quantity it measures mass temperature time electric current

kherson [118]

The S.I unit for the given term:

Mass is expressed in kilogram (kg)

temperature is expressed in kelvin (K)

Time is expressed in seconds (s)

Current is expressed in ampere (A)

Explanation:

Current:

The current can be defined as the electric charge flow in the surface (means ratio of charge per unit time). It is measured in ampere (A)

$Current\ I=\frac{\text { charge }}{\text { time }}$

Temperature: 

Kelvin (K), the general temperature unit in the international standard units system. The Kelvin scale is an absolute thermodynamic temperature scale that uses absolute zero, a temperature at which all thermal movements end with a classic description of thermodynamics.

Mass: 

Mass is both a feature of the objects weight and its resistance measurement to accelerate under the influence of pure force. The mass of the object also determines the gravitational force. The basic unit of mass is kilogram (kg)

Time: 

Time is the measurement of how much distance the objects takes to travel from one to another (speed). It is expressed in seconds (s).

5 0

3 years ago

Which statement best describes the process of making a solution by diluting a stock solution

liberstina [14]

Answer:

Add more solvent to decrease the concentration

3 0

3 years ago

Calculează masa zaharului si volumul apei necesare pentru prepararea 500g de soluție de zahăr cu partea de masa 20%

Sedbober [7]

T = 20 % : 20 / 100 = 0.2

m1 = solute

m2 = Solvent

T = m1 / m1 + m2

0.2 = 500 g / 500 g + m2

0.2 * ( 500 + m2 ) = 500

0.2 * 500 + 0.2 m2 = 500

100 + 0.2 m2 = 500

0.2 m2 = 500 - 100

0.2 m2 = 400

m2 = 400 / 0.2

m2 = 2000 g of water

hope this helps!

7 0

3 years ago

Tim has just jumped out of an airplane.The force of gravity pulls him downward,while air resistance pushes him upward

lesya692 [45]

Answer:

ya, it's gravity. What is the problem??

Explanation:

5 0

3 years ago