Testing for Cations and Anions

Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Anions

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Tags

NGSS.MS-PS2-3

Which of the following is an anion?

• Lithium

• Magnesium

• Iodide

• Silver

Describe the anion S^2-

• Silicon that gained 2 electrons

• Sulfide that gained 2 electrons

• Sulfur that gained 2 electrons

• Strontium that gained 2 electrons

A Beryllium atom that has lost 2 electrons would look like

• Be²⁺

• B^2-

• B²⁺

• Be^2-

Tags

NGSS.MS-PS1-1

The cation Rb⁺ has

• Had nothing happen to it

• Gained 1 electron

• Lost 1 electron

• Become negative

Complete these sentences on Testing for ANIONS...

Tests for SULFATES: -

- Add a couple of drops of dilute h___________ acid

- Add a few drops of b_____ c_______ solution

W____ precipitate of b_____ s______ will form

Complete these sentences on testing for ANIONS...

Tests for HALIDES...

- Add a couple of drops of dilute n_____ acid

-Add a couple of drops of s_____ n______ solution

Chlorine ----> _____

Bromine -----> _____

Iodine -----> _____

Fill in the blanks for these sentences on Testing for CATIONS...

Flame test for metal ions: -

Lithium -----> _______

Sodium -----> ______

Potassium -----> _____

Calcium - ______ / ___

Copper - _____

Complete these sentences on Testing for CATIONS...

Metal hydroxides are _________ and precipitate out a ________.

- Add a few drops of s_____ h________

CALCIUM -----> _____

COPPER -----> ____

IRON II -----> _____

IRON III -----> _____

ALUMINIUM -----> _____ ---> Colourless

MAGNESIUM -----> _____