CH11: Chapter 11 - Ions and Ionic Compounds - Chemistry
CH11: Chapter 11 - Ions and Ionic Compounds - Chemistry | in potassium bromide which element forms anions

Seven Ways On How To Prepare For In Potassium Bromide Which Element Forms Anions | In Potassium Bromide Which Element Forms Anions

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CH11: Chapter 11 - Ions and Ionic Compounds - Chemistry - in potassium bromide which element forms anions
CH11: Chapter 11 – Ions and Ionic Compounds – Chemistry – in potassium bromide which element forms anions | in potassium bromide which element forms anions

On a microscale acceptance add solutions containing lithium, calcium and silver cations to solutions containing fluoride, chloride, bromide and iodide anions, and almanac which combinations aftermath an insoluble precipitate. From the after-effects they attack to identify patterns of behaviour amid these anions, and try to explain them.

Lesson organisation

A well-organised accumulation of students, alive in pairs, should be able to complete the applied date in 10 minutes, accustomed the artlessness of the procedure. Altercation of the after-effects to analyze patterns should booty about the aforementioned time, but added altercation to aftermath explanations will depend on the akin of the class.

Anniversary alive accumulation will need:

Eye protection

Bright acetate area (e.g. OHP sheet), or bright artificial spotting bowl (well-plate) (Note 1)

Solutions (about 2 cm3) independent in artificial pipettes (Note 2)

Silver nitrate, 0.1 M

Lithium bromide, 1 M

Calcium nitrate, 0.4 M

Sodium fluoride, 0.5 M (HARMFUL)

Chemical Nomenclature - ppt download - in potassium bromide which element forms anions
Chemical Nomenclature – ppt download – in potassium bromide which element forms anions | in potassium bromide which element forms anions

Sodium chloride, 0.2 M

Potassium bromide, 0.2 M

Potassium iodide, 0.2 M

Refer to Bloom & Assurance and Technical addendum area beneath for added information.

 

Bloom & Assurance and Technical notes

Read our accepted bloom & assurance guidance

Wear eye protection. 

Argent nitrate solution, AgNO3(aq) – see CLEAPSS Hazcard and CLEAPSS Recipe Book.

Lithium boiler solution, LiBr(aq) – see CLEAPSS Hazcard.

Calcium nitrate solution, Ca(NO3)2(aq) – see CLEAPSS Hazcard. 

Chapter 11: Ionic and Covalent Compounds Chapter 11: Ionic and - in potassium bromide which element forms anions
Chapter 11: Ionic and Covalent Compounds Chapter 11: Ionic and – in potassium bromide which element forms anions | in potassium bromide which element forms anions

Sodium fluoride solution, NaF(aq), (HARMFUL) – see CLEAPSS Hazcard. 

Sodium chloride solution, NaCl(aq) – see CLEAPSS Hazcard and CLEAPSS Recipe Book. 

Potassium boiler solution KBr(aq) – see CLEAPSS Hazcard. 

Potassium iodide solution, KI(aq) – see CLEAPSS Hazcard and CLEAPSS Recipe Book. 

1 As an another to acetate sheets, cellophane spotting plates (well-plates) can be used, although may be difficult to obtain. Ordinary white spotting plates should still acquiesce precipitates to be observed, although not as easily.

2 Solutions for microscale abstracts such as this can be stored, distributed, and acclimated in distinctively able artificial pipettes. The starting point is a accumulation of fine-tip artificial pipettes, accessible in aggregate from, for example, Sigma-Aldrich (cat. ref. Z13,503-8). The pipettes are acclimatized as apparent in the diagrams below, abounding with about 2 cm3 of one of the solutions, labelled, and stored as sets of 7 altered solutions in old audio-cassette boxes or added acceptable container. Labels should accommodate hazard information.

 

Procedure

a  Create and alike a worksheet that can be covered by the acetate sheet, based on this table, scaled up to A4.

Argent nitrate solution

Lithium boiler solution

Chemistry: Chemical Bonding Activity - in potassium bromide which element forms anions
Chemistry: Chemical Bonding Activity – in potassium bromide which element forms anions | in potassium bromide which element forms anions

Calcium nitrate solution

Fluoride ions

Fluoride ions

Fluoride ions

Chloride ions

Chloride ions

Chloride ions

Boiler ions

Boiler ions

Boiler ions

Iodide ions

Chapter 11
Chapter 11 | in potassium bromide which element forms anions

Iodide ions

Iodide ions

 

b Cover the worksheet with a bright acetate sheet.

c Put 1 bead of anniversary of the halide ion solutions in the adapted box on the acetate sheet.

d Add one bead of argent nitrate band-aid to anniversary box in the aboriginal column.

e Add one bead of lithium boiler band-aid to anniversary box in the additional column.

f Add one bead of calcium nitrate band-aid to anniversary box in the third column.

g Record all observations in a acceptable table.

h Wash the acetate area beneath the tap and dry with a cardboard towel.

Teaching notes

File - in potassium bromide which element forms anions
File – in potassium bromide which element forms anions | in potassium bromide which element forms anions

This agreement looks at the similarities and differences in some of the backdrop of the simple halide anions. Anniversary of the halogens forms a singly-charged anion.

Collecting students’ after-effects should confirm:

Depending on their level, acceptance should be able of autograph both academic and ionic equations for the precipitation reactions observed.

For example:

NaCl(aq) AgNO3(aq) → NaNO3(aq) AgCl(s)

and the associated ionic equation:

Ag (aq) Cl−(aq) → AgCl(s)

The botheration with lithium fluoride, if encountered, may be due to the aftereffect of ion pairing in solution. This is due to the aerial apparent densities of allegation on both cation and anion, so that the abstracted ion activities are bereft to ability the solubility product. The added lithium halides are all actual soluble.

The accepted cessation is that fluorides behave rather abnormally from the otherhalides. This abnormality is accepted in all Groups, area the aboriginal aspect about has some aberrant properties.

Follow up altercation could focus on accessible affidavit for this, depending on the akin of the chic involved. Important factors include:

However there is a lot added to these phenomena than this, and agents will ambition to adjudicator for themselves the admeasurement and abyss of the altercation that is adapted for the acceptance involved.

Ionic Compounds Homework Practice Packet - in potassium bromide which element forms anions
Ionic Compounds Homework Practice Packet – in potassium bromide which element forms anions | in potassium bromide which element forms anions

Bloom & Assurance checked, 2016

This Applied Chemistry ability was developed by the Nuffield Foundation and the Royal Society of Chemistry.

© Nuffield Foundation and the Royal Society of Chemistry

Page aftermost adapted October 2015

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