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zzz [600]
4 years ago
10

12. When a chlorine atom forms an ion its radius increases, but when a sodium atom forms an ion its radius decreases. Explain th

is apparent contradiction

Chemistry
1 answer:
Lana71 [14]4 years ago
4 0

Explanation:

When a chlorine atom forms an ion, it gains electrons, making it negative.  A neutral chlorine will become a chlorine with a -1 charge.  When it gains an electron, the radius increases.

When a sodium atom forms an ion, it loses electrons, making it positive.  A neutral sodium will become a sodium with a +1 charge.  When it loses an electron, the radius decreases.

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How does chemical activity change in Group 17?
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halogen is the name of group 17 on the table of elements

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How do you do this problem?
xeze [42]

Answer:

Ag₂CrO₄(s) + H⁺(aq) ⟶ 2Ag⁺(aq) + HCrO₄⁻(aq)

Explanation:

Ag₂CrO₄(s) ⇌ 2Ag⁺(aq) + CrO₄²⁻(aq).

Silver chromate is the salt of a strong base (AgOH) and a weak acid (H₂CrO₄).

HCrO₄⁻ is an even weaker acid than H₂CrO₄, so CrO₄²⁻ is a strong base.

Any added H⁺ will immediately combine with the chromate ions according to the reaction

H⁺ + CrO₄²⁻ ⟶ HCrO₄⁻

thereby removing chromate ions from solution.

According to Le Châtelier's Principle, more silver chromate will dissolve to replace the chromate ions that the H⁺  removes.

The overall equation for the reaction is

Ag₂CrO₄(s) ⇌ 2Ag⁺(aq) + <em>CrO₄²⁻(aq) </em>

<u>H⁺(aq) + </u><em><u>CrO₄²⁻(aq)</u></em><u> ⟶ HCrO₄⁻(aq) </u>

Ag₂CrO₄(s) + H⁺(aq) ⟶ 2Ag⁺(aq) + HCrO₄⁻(aq)

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4 years ago
Which of the following best explains the Law of Conservation of Mass?
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Answer:

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3 0
3 years ago
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2k+Cl2=2KCI how many grams of KCl is produced from 8.50 g of K and excess Cl2
ZanzabumX [31]

Answer:

Mass = 16.4 g

Explanation:

Given data:

Mass of K = 8.50 g

Mass of KCl produced = ?

Solution:

Chemical equation:

2K + Cl₂     →    2KCl

Number of moles of K:

Number of moles = mass/ molar mass

Number of moles = 8.50 g/ 39 g/mol

Number of moles = 0.22 mol

Now we will compare the moles of potassium and potassium chloride.

                  K         :        KCl

                  2         :          2

                0.22      :        0.22

Mass  of KCl:

Mass = number of moles × molar mass

Mass = 0.22 mol × 74.55 g/mol

Mass = 16.4 g

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3 years ago
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