All categories

3 years ago

Celina has a water sample that’s contaminated with salt and microorganisms. Which method should she use to purify the water?

Chemistry

2 answers:

kap26 [50]3 years ago

7 0

Answer: Second option is correct.

Explanation:

Filtration is the method of removing impurities solid particles from liquid.

Distillation is the method of removing impurities in a boiling liquid mixture.

Osmosis is the movement of water from low concentration to high concentration through a plasma membrane.

Reverse osmosis is the method of purification of water to remove ions and unnecessary molecules from drinking water.

We have given the situation that "There is a water sample contaminated with salt and micro organisms."

We need to purify the water.

Filtration is the best method to purify the water and remove the salt and micro organisms.

As there is slight difference between filtration and distillation.

In distillation we need to boil the water , so there heat is needed for this whereas in filtration, it just remove solid from fluid without being heated.

Hence, Second option is correct.

Alik [6]3 years ago

3 0

B) filtration
(hope this helps) ~A

You might be interested in

The limestone used in building the Egyptian pyramids was used because it is _____________

kvasek [131]

Answer:

hard and brittle

hope this helps you ☺️☺️

good night take care sweet dream

3 0

3 years ago

Read 2 more answers

I2(g) + Cl2(g)2ICl(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.62 mol

galina1969 [7]

Answer:

The change in entropy of the surrounding is -146.11 J/K.

Explanation:

Enthalpy of formation of iodine gas = $\Delta H_f_{(I_2)}=62.438 kJ/mol$

Enthalpy of formation of chlorine gas = $\Delta H_f_{(Cl_2)}=0 kJ/mol$

Enthalpy of formation of ICl gas = $\Delta H_f_{(ICl)}=17.78 kJ/mol$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]$

For the given chemical reaction:

$I_2(g)+Cl_2(g)\rightarrow 2ICl(g),\Delta H_{rxn}=?$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(2\times \Delta H_f_{(ICl)})]-[(1\times \Delta H_f_{(I_2)})+(1\times \Delta H_f_{(Cl_2)})]$

$=[2\times 17.78 kJ/mol]-[1\times 0 kJ/mol+1\times 62.436 kJ/mol]=-26.878 kJ/mol$

Enthaply change when 1.62 moles of iodine gas recast:

$\Delta H= \Delta H_{rxn}\times 1.62 mol=(-26.878 kJ/mol)\times 1.62 mol=-43.542 kJ$

Entropy of the surrounding = $\Delta S^o_{surr}=\frac{\Delta H}{T}$

$=\frac{-43.542 kJ}{298 K}=\frac{-43,542 J}{298 K}=-146.11 J/K$

1 kJ = 1000 J

The change in entropy of the surrounding is -146.11 J/K.

4 0

3 years ago

two samples of water, 10 grams and 50 grams are in sperate cups which of the following properties is different for the two boili

Trava [24]

Answer:

volume

Explanation:

The volume of the two samples of water will be different because volume is the amount of space occupied by a body. It is dependent on the amount of materials it contains.

The 50g sample will have a higher volume compared to the 10g sample.
The boiling point and density are intensive properties and do not depend on the amount of matter present.
Since both samples are from the same source, they will have the same color.

7 0

3 years ago

Read 2 more answers

The formula weight of magnesium hydroxide is________ amu.<br> amu.

wlad13 [49]

Answer:

58.316 is the formula weight of magnesium hydroxide

5 0

2 years ago

How can you model the cycling of matter in the Earth system?

Rus_ich [418]

Answer:

The cycling of matter is important to many Earth processes and to the survival of organisms the existing matter must cycle continuously for this planet to support life Water, carbon, nitrogen, phosphorus, and even rocks move through cycles If these materials did not cycle, Earth could not support life.

Explanation:

5 0

3 years ago