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2 years ago

What is the charge on Na and why is it called a cation?

Chemistry

2 answers:

Crank2 years ago

8 0

Answer:

The cation produced in this way, Na +, is called the sodium ion to distinguish it from the neutral element. Because the ion has 11 positive protons and 10 negative electrons, there is a net positive charge.

Explanation:

Zigmanuir [339]2 years ago

3 0

Answer: The cation produced in this way, Na +, is called the sodium ion to distinguish it from the neutral element. Because the ion has 11 positive protons and 10 negative electrons, there is a net positive charge

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Consider an exceptionally weak acid, HA, with a Ka = 1x10 -20 . You make a 0.1M solution of the salt Na

Vedmedyk [2.9K]

Answer:

$pH=13$

Explanation:

Hello,

In this case, given the acid, we can suppose a simple dissociation as:

$HA\rightleftharpoons H^+ + A^-$

Which occurs in aqueous phase, therefore, the law of mass action is written by:

$Ka=\frac{[H^+][A^-]}{[HA]}$

That in terms of the change $x$ due to the reaction's extent we can write:

$1x10^{-20}=\frac{x*x}{0.1M-x}$

But we prefer to compute the Kb due to its exceptional weakness:

$Kb=\frac{Kw}{Ka}=\frac{1x10^{-14}}{1x10^{-20}} =1x10^{-6}$

Next, the acid dissociation in the presence of the base we have:

$Kb=\frac{[OH^-][HA]}{[A^-]}=1x10^{6}=\frac{x*x}{0.1-x}$

Whose solution is $x=0.0999M$ which equals the concentration of hydroxyl in the solution, thus we compute the pOH:

$pOH=-log([OH^-])=-log(0.0999)=1$

Finally, since the maximum scale is 14, we can compute the pH by knowing the pOH:

$pH+pOH=14\\\\pH=14-pOH=14-1\\\\pH=13$

Regards.

5 0

3 years ago

Read 2 more answers

Use the electronic configuration to explain the occurrence of period and groups to the periodic table.

lina2011 [118]

Answer:

H2O

Explanation:

hydrogen has 1 electron

and oxygen has 6 electron which form a water molecule Atom

6 0

2 years ago

Meta-bromoaniline was treated with nano2 and hcl to yield a diazonium salt. Draw the product obtained when that diazonium salt i

Y_Kistochka [10]

Answer:

I believe is the correct answer

Explanation:

100bromoaniline+nano2+hcl

4 0

2 years ago

When KOH dissolved in ethanol, what is the intermolecular attraction between OH- ions and C2H5OH molecules

mezya [45]

Lon-dipole will be your answer

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2 years ago

Chlorine is a very reactive non-metals. Why

Vadim26 [7]

Answer:

Chlorine is a very reactive non metals because this element don't form any known chemical compound.

Explanation:

Chlorine atoms have a lot of valance electrons without being complete on its own, so it has a greater need to seek it's conjugates. That's called electronegativity. Halogens are highly reactive because of their electronegativity.

3 0

3 years ago