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3 years ago

Weak acids are poor conductors of:

Chemistry

1 answer:

valentina_108 [34]3 years ago

3 0

Answer: Weak acids are poor conductors of electricity.

Explanation:

Weak acids are defined as the acids which dissociate weakly or partially when dissolved in water (polar solvent).

For example, $CH_3COOH \rightleftharpoons CH_3COO^{-} + H^{+}$

Due to less dissociation there will be less number of ions present in a solution of weak acid. As a result, a weak acid will be poor conductor of electricity.

As electricity is the flow of ions.

Thus, we can conclude that weak acids are poor conductors of electricity.

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Write the symbol for each of the following ions:

kap26 [50]

Answer:

a) $_{31}^{71}\textrm {P^{3+}}$

b) $_{35}^{80}\textrm {Br^{-}}$

c) $_{90}^{232}\textrm {Th^{4+}}$

d) $_{38}^{87}\textrm {Sr^{2+}}$

Explanation:

For neutral atoms:

Atomic Number (Z)= number of protons = number of electrons

Mass number (A) = number of protons + number of neutrons

For ions with positive net charge:

Number of protons = Z + net charge

For ions with negative net charge:

Number of protons= Z - net charge

a) A = 71, Charge = +3

Number of electrons = 28

Number of protons = 28 +3 =31

$_{31}^{71}\textrm {P^{3+}}$

b) A = 35, Z = 45+35=80, Charge = -1

Number of protons =35

Number of neutrons = 45

Number of electrons = 36

Charge = Number of protons- Number of electrons =35-36 = -1

$_{35}^{80}\textrm {Br^{-}}$

c) Charge = +4

Number of electrons = 86

Number of protons = Z = 86+4 = 90

mass number = A = 90+142 = 232

$_{90}^{232}\textrm {Th^{4+}}$

d) Charge = +2

Atomic number = Number of protons = Z = 38

mass number = A = 87

$_{38}^{87}\textrm {Sr^{2+}}$

3 0

3 years ago

KClO3 ---> KCl + O2 Balance the decomposition chemical reaction. A) KClO3 ---> KCl + O2 B) 2KClO3 ---> KCl + 3O2 C) 2KC

Damm [24]

And the answer is C.

5 0

3 years ago

What information about an atom's properties can you read from the periodic table?

zimovet [89]

The principal thing that one can read from a periodic table is the atomic number which is the number in the box that the element symbol appears and it means the number of protons in the nucleus of its atom and this number determines its chemical properties and is unique for each chemical element. The table is color coded to show the different types of elements ie "transition metals, alkali metals, noble gases" etc. and these different types are grouped together.

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4 years ago

Which of these statements best describes a similarity between combustion and respiration?

hodyreva [135]

Both respiration and combustion can produce carbon dioxide. Therefore, of the answers in your list only the third one is correct.

8 0

3 years ago

Read 2 more answers

Suppose you have crude reaction mixture containing napthalene, benzoic acid, and aniline dissolved in an organic solvent, and yo

Leto [7]

Answer:

d. Adding 5% HCl solution to the crude reaction mixture will protonate aniline increasing its solubility in the aqueous solution.

Explanation:

On this case, we have to check the structures of each compound (figure 1). For naphthalene we dont have any functional groups therefore, the addition of HCl or NaOH it will not affect naphthalene so we can discard "B" and"C".

When we add HCl solution we will have the production $H^+$ the presence of this hydronium ion will protonate the acid, so we can discard a.

Finally, for d when we add $H^+$ the hydronium ion will react with aniline (a base) and will produce an ammonium ion. This ammonium ion have a positive charge, therefore the polarity will increase and the molecule would be more soluble on water (figure 2).

I hope it helps!

7 0

3 years ago