How do I break ion bonds

Examination of table salt and other salts

www.chemiezauber.de

examinationofTable salt

andotherSalt

(Flame test, silver nitrate test)

The smallest unit ofTable salt consists

from a sodium ion and a chloride

Ion. The molecular formula is that of NaCl

Molecular formula in ion formula notation

is Na + Cl -. Metal ions are always positive

loaded. Positively charged ions are called with

common name cations. Non-metal

Ions are (almost always) negatively charged and

Commonly called anions.

8th grade

Lesson series:

Salts (1)

Page in folder: .......

Date: ……………

Because the sodium ion is positively charged and

the chloride ion is negatively charged

adhere to both types of ions and hold in an ion pack or in one

Ion lattices firmly together. The cohesion is called ionic bonding.

In aqueous solution, the ions are all individually, hydrated. With help

the flame test can be metal ions due toand the flame color

prove. Halide ions (Cl-, Br-, I-) can be used with the

Prove silver mirror sample. A precipitate forms on this sample

from (formation of a solid salt), the sample was positive.

equipment and Chemicals

6 test tubes, test tube stand, test tube holder,

Magnesia sticks (at the front of the teacher's desk), gas burner, matches.

At the front of the teacher's desk:

• sodium chloride (Table salt)

• Sodium sulfate (Glauber's salt, is called

Laxatives used)

• Potassium chloride (important

Fertilizer)

• Lithium chloride (is strong

hygroscopic and is therefore called

Desiccant - also for

Room dehumidification - used)

• Silver nitrate solution ("Höllenstein")

• Distilled water (aqua dest.)

Danger:

Silver nitrate, also Höllenstein

called blacks and etches the skin

and other items. Man

used it earlier for

Etch away of Warts. So go

handle it very carefully!


execution

Preparations

1. Place an aqueous test tube in each of four test tubes

Sodium chloride solution, an aqueous sodium sulfate solution, an aqueous

Potassium chloride solution and an aqueous lithium chloride solution.

Flame test

2. Anneal a magnesia stick in the non-glowing gas flame,

until the flame is no longer so bright yellow. Dip the annealed

Magnesia stick briefly in a test tube with an aqueous

Saline solution and then hold the magnesia stick in the not

glowing gas flame. Wear your observation (flame color) in

the table below and repeat the experiment with each saline solution.

Before doing this, break the tip of the magnesia stick you used

Cool off.

Silver nitrate sample

3. Add three drops of silver nitrate solution to each aqueous salt solution

added. Enter your observations in the table.

4. Put some tap water in an empty test tube, in another

empty test tube of distilled water and give again three at a time

Add drops of silver nitrate solution. Carry your observations into the

Table a.

Observations

Flame color

Silver nitrate sample

Silver nitrate sample

evaluation

Sodium chloride sodium sulfate potassium chloride lithium chloride

Tap water Distilled water

The flame color (color: ...............) is evidence of ............ ions.

The flame color (color: ...............) is evidence of ............ ions.

The flame color (color: ...............) is evidence of ............ ions.

Tap water contains ......................... ions, distilled water

Water not.

www.chemiezauber.de Investigation of table salt and other salts < / strong> (flame test, silver nitrate test) The smallest structural unit of table salt consists of a sodium ion and a chloride ion. The molecular formula is NaCl, the molecular formula in ion formula notation is Na + Cl -. Metal ions are always positively charged. Positively charged ions are commonly called cations. Non-metal ions are (almost always) negatively charged and are generally referred to as anions. 8th grade Lesson series: Salts (1) Page in folder: ....... Date: …………… Because the sodium ion is positively charged and the chloride ion is negatively charged , Both types of ions attract each other and hold tightly together in an ion pack or in an ion lattice. The cohesion is called ionic bonding. In aqueous solution, the ions are all individually, hydrated. With the help of the flame test, metal ions can be detected and the flame color. Halide ions (Cl-, Br-, I-) can be detected with the silver mirror sample. If a precipitate forms on this sample (formation of a solid salt), the sample was positive. Devices and chemicals 6 test tubes, test tube racks, test tube holders, magnesia sticks (at the front of the teacher's desk), gas burners, matches. In front of the teacher's table: • Sodium chloride ( table salt ) • Sodium sulfate (Glauber's salt, is used as a laxative) • Potassium chloride (important fertilizer) • Lithium chloride (is very hygroscopic and is therefore used as a drying agent - also used for dehumidifying rooms) • Silver nitrate solution ("Höllenstein") • Distilled water (aqua dist.) Warning: Silver nitrate, also called Höllenstein, blackens and etches the skin and other items. It used to be used to etch away from warts. So handle it very carefully!

You have already reported this magazine
Thank you for your help in keeping this platform clean.
The editorial team will take a look at it as soon as possible.

Send the magazine by email

Are you sure you want to delete the template?

There is no download available for this magazine

Magazine: Examination of table salt and other salts