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Vesnalui [34]
4 years ago
5

Which equilibrium system has HCO3- acting as a Brønsted-Lowry base?

Chemistry
1 answer:
IrinaVladis [17]4 years ago
8 0
A Brønsted-Lowry base is a base is a proton acceptor.

In the only case where this is done is when HCO3- accepts a proton and becomes H2CO3.

In the other cases, HCO3- is donating a proton which makes it an acid.
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when a 12.7 g chunk of zinc dissolves in 500. ml of 1.450 m hcl, what is the concentration of hydrogen ions remaining in the fin
Schach [20]

Concentration of hydrogen ions remaining in the final solution is .673 M

In original solution we have 1.450M of HCl

1.450 M means 1.450 moles of HCl in 1 liter of water

Therefore, number of moles of HCl in 500ml of water will be

                                                           =  1.450*0.5 moles

                                                           =  0.725 moles of HCl

Reaction between HCl and Zn happens when zinc is added -

         Zn(s)  +  2HCl     →      ZnCl_{2}  +  H_{2}

Therefore two moles of HCl is needed for 1 mole of zinc

Thus number of moles of HCl needed to react with 12.7g of Zinc will be

                                   =  (12.7/ 65.38   moles      of Zn )* (2moles of HCl/mole of Zn)

                                   = .388 Moles

So moles of HCl left  = 0.725 - .3888

                                  =  0.3365 moles

In 1 Mole of HCl there is 1 mole of H because

                                    HCl  →  H^{+}  +  Cl^{-}

Therefore in 0.3365 mole HCl there will be 0.3365 moles of H

Thus final concentration of H ions in final solution is =

                                      =  0.3365mole/0.5 L

                                      = 0.673M

To know more about concentration in solution

brainly.com/question/22837979

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8 0
2 years ago
Develop a definition of chemical change using atoms and molecules in your definition. (please help)
Arisa [49]

Answer:

a chemical change is a substance change in to a new substance

8 0
3 years ago
NEEDDDD HELPPLZZZZZ ANSWER​
statuscvo [17]

Answer:

this is for the table for question 7

Explanation:  

element name:                # of valence electrons :               group:  

lithium                                         1                                               1

sulfur                                           6                                             16

barium                                         2                                              2            Phosphorus                                5                                             15

germanium                                 4                                             14        

fluorine                                        7                                              9      

aluminum                                    3                                             13          

krypton                                        8 full shells                           18

5 0
4 years ago
Describe the kinetic, potential and thermal energy of each state of matter?
Lerok [7]

Answer:

Particles of matter possess energy called kinetic energy.

Solid cannot be compressed, but gases are highly compressible.

The Kinetic energy of molecules of gases is very large & solids the least.

On heating a sublimable liquid, the molecules break free & escape from the surface of the solid directly into vapour.

Particles of matter move more rapidly on the application of heat

6 0
3 years ago
Can someone please help with these 2?
pochemuha

Equilibrium shifts to the right.

OPTION A

8 0
3 years ago
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