04/11: Identification of ions

• Chemistry
• Secondary Education

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CHEMISTRY 10

20: Identification of ions  

Week 13

W E L C O M E !       Today is Wednesday, the 6th of November.

• Where will I put my learning materials: notebook, coursebook, pen and pencil, and fully-charged laptop?
  
• Have I kept my phone in your locker?
• Have I gone to the bathroom before the class starts?
• Have I checked any announcements or missing work on our Google Classroom?
• Am I seated in my assigned chair?

• deduce the formula of an ionic compound from the charges on the ions.
• describe the use of a flame test to identify the cations:(a) lithium, Li⁺; (b) sodium, Na⁺; (c) potassium, K⁺; (d) calcium, Ca²⁺; (e) barium, Ba²⁺.
• describe tests to identify the anions: chloride, Cl ⁻, bromide, Br ⁻, and iodide, I ⁻, by acidifying with dilute nitric acid and adding aqueous silver nitrate.

What am I going to do?

• Prepare my periodic table.
• Prepare my learning device.
• Stay on LessonUp, and close other tabs.
• Answer the given questions to the best I can.
• Share my thoughts after the review.

What am I going to do?

• Prepare my periodic table.
• Prepare my learning device.
• Stay on LessonUp, and close other tabs.
• Answer the given questions to the best I can.
• Share my thoughts after the review.

What charge will SODIUM have when it turns into a cation?

1. 1+
2. 2+
3. 3+
4. 4+

What charge will CHLORINE have when it turns into an anion?

1. 1+
2. 1-
3. 7+
4. 7-

What charge will LITHIUM have when it turns into a cation?

1. 1+
2. 1-
3. 7+
4. 7-

What charge will CALCIUM have when it turns into a cation?

1. 1+
2. 1-
3. 2+
4. 2-

What charge will SULFUR have when it turns into an anion?

1. 1+
2. 1-
3. 2+
4. 2-

What charge will ALUMINIUM have when it turns into a cation?

1. 3+
2. 3-
3. 2+
4. 5-

What charge will BISMUTH have when it turns into a cation?

1. 3+
2. 3-
3. 5-
4. 5+

What charge will FLUORINE have when it turns into an anion?

1. 3+
2. 3-
3. 5-
4. 5+

What charge will MAGNESIUM have when it turns into a cation?

1. 1+
2. 2+
3. 3-
4. 2-

What charge will OXYGEN have when it turns into an anion?

1. 1+
2. 2+
3. 3-
4. 2-

What charge will NITROGEN have when it turns into an anion?

1. 1+
2. 2+
3. 3-
4. 2-

What charge will CARBON have when it turns into an anion?

1. 4+
2. 3+
3. 4-
4. 3-

What charge will POTASSIUM have when it turns into a cation?

1. 1+
2. 2+
3. 3+
4. 4+

What have I learned from our review?

mind map

I learned that...

• How does an ionic compound form?

• How does an ionic compound form?

• How does an ionic compound form?

• How does an ionic compound form?

• How does an ionic compound form?

• How does an ionic compound form?

• How does an ionic compound form?

Compound ion

TRUE OR FALSE
"Compound ions" are made up of several different atoms (of non-metals) bonded together and with an overall charge.

1. TRUE
2. FALSE

hydroxide anion

hydride anion

What's the difference?

-

Examples of Compound ions

What
compound ion
is this?

1. ammonium
2. ammonia
3. hydroxide
4. nitrate

What
compound ion
is this?

1. ammonium
2. phosphate
3. phosphorus
4. nitrate

What
compound ion
is this?

1. sulfite
2. sulfate
3. sulfur
4. sulfide

What
compound ion
is this?

1. carbonate
2. carbide
3. carbon dioxide
4. carbonite

What
compound ion
is this?

1. nitrite
2. nitride
3. nitrate
4. nitrogen trioxide

What
compound ion
is this?

1. hydride
2. hydrogen
3. hydrate
4. hydroxide

• How do I write the formula of ionic compounds with compound ions?

• How do I write the formula of ionic compounds with compound ions?

• How do I write the formula of ionic compounds with compound ions?

• How do I write the formula of ionic compounds with compound ions?

• How do I write the formula of ionic compounds with compound ions?

lithium  and hydroxide ion

rubidium and carbonate ion

I can deduce the formula of an ionic compound from the charges on the ions.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

Guided Practice

• Continue on page 8 of your learning module.
• Study the sample.
• Complete the table.
• If I have any questions, I will raise my hand.

I can deduce the formula of an ionic compound from the charges on the ions.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

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CHEMISTRY 10

20: Identification of ions  

Week 13

• Any idea what this salt is?

Qualitative chemical analysis

• a process that helps you know or investigate if a particular substance is present or absent in an UNKNOWN sample.

flame test 

(for cations only) 

javalab.org

How to do the Flame Test

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CHEMISTRY 10

20: Identification of ions  

Week 13

How to identify halide anions (negative Group VII ions)

• halide ions (or negative group VII anions) in an unknown sample through precipitation (forming an insoluble solid in the solution).

How to do Precipitation

Guided Practice

• Continue on pages 9 and 10 of your learning module.
• Complete the table.
• If I have any questions, I will raise my hand.

Sharing my thought process.

I can deduce the formula of an ionic compound from the charges on the ions.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

I can describe the use of a flame test to identify the cations:(a) lithium, Li⁺; (b) sodium, Na⁺; (c) potassium, K⁺; (d) calcium, Ca²⁺; (e) barium, Ba²⁺.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

I can describe tests to identify the anions: chloride, Cl ⁻, bromide, Br ⁻, and iodide, I ⁻, by acidifying with dilute nitric acid and adding aqueous silver nitrate.

Yes, I can confidently do it.

Yes, I can but need more practice.

No, I lack confidence so I need more practice or ask help from my teacher.

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STEM Project

Building a Futuristic City Scale Model

Week 13