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Eva8 [605]
3 years ago
13

A chunk of limestone, which is calcium carbonate, reacts with acid. How might you increase the rate of this reaction?

Chemistry
2 answers:
pantera1 [17]3 years ago
8 0
Crush the limestone... it would give more area for the acid to react
pishuonlain [190]3 years ago
6 0

Answer: Option (b) is the correct answer.

Explanation:

When calcium carbonate is added to an acid then the reaction will be as follows.

           CaCO_{3} + MH \rightarrow HCO^{-}_{3} + MCa

The HCO^{-}_{3} formed is easily soluble in water.

Therefore, when we crush calcium carbonate the surface area of particles will increase. As a result more number of molecules will be dispersed in the acid, hence more is the number of calcium carbonate particles more readily the reaction will occur.

Thus, we can conclude that the rate of this reaction increases when we crush the lime stone or calcium carbonate.

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Which of the following does not describe a characteristic of carbon
8_murik_8 [283]
What are the options? I can try to give you an answer if options are provided.
8 0
3 years ago
Scoring Scheme: 3-3-2-1 Part I. How many mL of 6 M NaOH stock solution should be used to prepare the 500 mL of 0.2 M NaOH? Pleas
Orlov [11]

Answer : The volume of 6M NaOH stock solution is, 16.7 mL

Explanation :

To calculate the volume of NaOH stock solution, we use the equation given by neutralization reaction:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of NaOH stock solution.

M_2\text{ and }V_2 are the molarity and volume of NaOH.

We are given:

M_1=6M\\V_1=?\\M_2=0.2M\\V_2=500mL

Putting values in above equation, we get:

6M\times V_1=0.2M\times 500mL\\\\V_1=16.7mL

Thus, the volume of 6M NaOH stock solution is, 16.7 mL

4 0
3 years ago
Is the following true or false every element in the periodic table follows the aufbau principle
gulaghasi [49]

Answer:

True

Explanation:

It is true that every element in the periodic table follows the Aufbau's principle.

The principle states that "the sublevels with lower energies are filled up before those with higher energies".

  • Sublevels do not fill up in numerical order.
  • This is true when writing the electronic configuration of all atoms on the periodic table.
7 0
3 years ago
Please help thank you (15 points)
Eva8 [605]

Answer:

D. The sun has less gravitational pull on Pluto because it is farther away.

6 0
2 years ago
Calculate the pH of a solution created by placing 2.0 grams of yttrium hydroxide, Y(OH)3, in 2.0 L of H2O. Ksp for Y(OH)3 is 6.0
oee [108]

Answer:

pH = 8.314

Explanation:

  • Y(OH)3(s) ↔ Y+  +  3OH-

equil:   S               S         3S

∴ Ksp = [ Y+ ] * [ OH- ]³ = 6.0 E-24

⇒ 6.0 E-24 = ( S )*( 3S )³

⇒ 6.0 E-24 = 27S∧4

⇒ 2.22 E-25 = S∧4

⇒ ( 2.22 E-25 )∧(1/4) = S

⇒ S = 6.866 E-7 M

⇒ [ OH- ] = 3*S =2.06 E-6 M

⇒ pOH = - Log [ OH- ]

⇒ pOH = - Log ( 2.06 E-6 )

⇒ pOH = 5.686

∴ pH = 14 - pOH

⇒ pH = 8.314

8 0
3 years ago
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