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Reptile [31]
3 years ago
15

The periodic table organizes elements according to INCREASING

Chemistry
2 answers:
jeyben [28]3 years ago
5 0
C would be the correct answer
expeople1 [14]3 years ago
5 0

Answer:

c is the right answer thanks

Explanation:

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Which of the following has the lowest Ka?a. carbonic acid b. dihydrogen phosphate c. phosphoric acid d. bicarbonate
Naya [18.7K]

Explanation:

A compound or molecule which will have least dissociation and that is not able to given hydrogen ion easily upon dissociation will also have a low value of K_{a}.

Dissociation of the given compounds or species will be as follows.

 H_{2}CO_{3} \rightleftharpoons H^{+} + HCO^{-}_{3}

 H_{2}PO^{-}_{4} \rightleftharpoons H^{+} + HPO^{-}_{4}

 H_{3}PO_{4} \rightleftharpoons H_{+} + H_{2}PO^{-}_{4}

As, chemical formula of bicarbonate is HCO^{-}_{3} and due to the presence of a negative charge it is difficult to lose a positively charged hydrogen ion. This is because oppositely charged ions will be bonded by strong force of attraction.

Hence, it will not easily lose a hydrogen ion due to which bicarbonate has the lowest K_{a}.

Thus, we can conclude that out of the given species bicarbonate has the lowest K_{a}.    

7 0
3 years ago
Chemical equations need to be balanced in order to satisfy the law of
cupoosta [38]
To satisfy the law of conservation of mass
3 0
4 years ago
Read 2 more answers
Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: ?H3PO4+?Mg(
natulia [17]
Please note that since magnesium is in group 2 it has a valency of 2+ and so the formula for magnesium hydroxide is
M
g
(
O
H
)
2
[Mistake in question]
This is a typical neutralization reaction of an acid with a base to form a salt and water. The reaction is exothermic, gives off heat,
Δ
H
<
0
, and may be balanced by adding balancing numbers in front, ie adding molecules, in order to ensure that the total number of atoms of each element is the same on the left and right hand sides of the equation.
Doing so we obtain :
2
H
3
P
O
4
+
3
M
g
(
O
H
)
2
→
M
g
3
(
P
O
4
)
2
+
6
H
2
O
4 0
3 years ago
Can you identify an atom without knowing number of neutrons in it?​
Pie

Answer:

yes

Explanation:

to identify an atom you need to know either it's atomic number or it's proton number

while the neutron is used to determine it's atomic mass

6 0
2 years ago
How many moles of nitrogen gas will occupy a volume of 5L at 3.85 atm and 27c?
Olegator [25]

Answer:

n=0.78mol

Explanation:

Hello there!

In this case, according to the given information, it possible for us to realize that this problem is solved via the ideal gas equation:

PV=nRT

By which we solve for n (moles) as shown below:

n=\frac{PV}{RT}

Then, we plug in the given pressure, volume and temperature (in K) to obtain:

n=\frac{3.85atm*5L}{0.08206\frac{atm*L}{mol*K}*(273+27)K} \\\\n=0.78mol

Regards!

7 0
3 years ago
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