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marusya05 [52]
3 years ago
6

Why do atoms share electrons in covalent bonds?

Chemistry
2 answers:
vladimir2022 [97]3 years ago
7 0
To fill the other element's shell.
Mrac [35]3 years ago
4 0

Answer:

<em>Atoms share electrons</em> in <em>covalent bonds</em> because in this way both atoms attain the more stable configuration of a noble gas (complete valence shell).


Explanation:

Covalents bonds are the chemical bonds that result when <em>two atoms share </em>the <em>electrons</em> of the valence shell (the outermost shell of the atoms).


The shared electrons may be count as belonging to the two atoms that form the bond, and so both atoms will gain the electrons that permit them to complete the 8 electrons in their outermost shell, which is the most stable configuration of the noble gases (2 in the special case of hydrogen and helium). This is the so called octet rule.


The covalent bonds are possible between elements that are close in the periodic table, meaning that their electronegativitiies are similar, and are typical of non-metal elements.


When two or more atoms are bonded by covalent bonds they form a molecule. Some examples of molecules formed by pure covalent bonds are: diatomic hydrogen, diatomic chlorine, and diatomic sulfur.


Since one atom of chlorine has 7 valence electrons it needs one additional electron to complete the 8 electrons (octet rule). Hence, two atomos of chlorine  may share one electron each, and so both atoms will count 8 electrons in the outermost shell, gaining stabilization both.

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Why does the reaction proceed more quickly when the surface area is increased?
Gelneren [198K]
When particles collide with the surface of the solid.
3 0
2 years ago
The Ksp can be used to find the concentration of hydroxide ions, and thus determine the pH given a concentration of of aluminum.
Anton [14]

Answer:

3.9.

Explanation:

(Molar mass of 342.15 g/mol).

The first thing to do in this question is to coverts our units. We are given 6.70 lb = 453.592 × 6.70 lb = 3039.0664 g of aluminum sulfate.

2050 gallons of water = 2050 × 3.785 = 7759.25 Litres.

After this we will now look for the Concentration aluminum sulfate using the formula below:

Concentration = number of moles ÷ volume. ------------------------------------(1).

Recall; Number of moles = 3039.0664/ 342.15 = 8.8823 moles. The volume = 2050 gallons = 7759.25 Litres.

Therefore, slotting in the values of of number of moles and volume into the equation (1) above, we have;

Concentration= 8.8823 moles/ 7759.25 Litres. = 0.001145 M.

The next equation we are going to make use of today is that of the solubilty product that is;

Ksp = (Al^3+) (OH^-)^3.

So, we have the ksp = 1.3 × 10^-33 and the value of (Al^3+)= 0.001145 M.

Hence, making (OH^-) the subject of the formula;

(OH^-) = ( 1.3 × 10^-33 / 0.001145)^1/3.

(OH^-) = 8 × 10^-11 M.

Hence, pOH = - log (OH^-)

pOH = - log (8 × 10^-11).

pOH = 10.1

Therefore, the values of pH is; 1

pH + pOH = 14.

pH = 14 - 10.1 = 3.9.

3 0
3 years ago
If you have 100 ml of a 0.10 m tris buffer (pka 8.3) at ph 8.3 and you add 3.0 ml of 1.0 m hcl, what will be the new ph?
sukhopar [10]

The new pH is 7.69.

According to Hendersen Hasselbach equation;

The Henderson Hasselbalch equation is an approximate equation that shows the relationship between the pH or pOH of a solution and the pKa or pKb and the ratio of the concentrations of the dissociated chemical species. To calculate the pH of the buffer solution made by mixing salt and weak acid/base. It is used to calculate the pKa value. Prepare buffer solution of needed pH.

                       pH = pKa + log10 ([A–]/[HA])

Here, 100 mL  of  0.10 m TRIS buffer pH 8.3

                 pka = 8.3

         0.005 mol of TRIS.

∴  8.3 = 8.3 + log \frac{[0.005]}{[0.005]}

<em>    </em>inverse log 0 = \frac{[B]}{[A]}

   \frac{[B]}{[A]} = 1

Given; 3.0 ml of 1.0 m hcl.

           pka = 8.3

           0.003 mol of HCL.

pH = 8.3 + log \frac{[0.005-0.003]}{[0.005+0.003]}\\pH = 8.3 + log \frac{[0.002]}{[0.008]}\\\\pH = 8.3 + log {0.25}\\\\pH = 8.3 + (-0.62)\\pH = 7.69

Therefore, the new pH is 7.69.

Learn more about pH here:

brainly.com/question/24595796

#SPJ1

 

8 0
2 years ago
The octet rule pertains to:
Vinil7 [7]
I think the answer to c
4 0
3 years ago
What are all the different types of chemical change?
creativ13 [48]

Answer:

the types of chemical reaction are combination, decomposition, single replacement, double replacement, combustion

4 0
3 years ago
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