Techniques

Question 1

any process in which a new chemical substance is formed

Answer 1

Reaction

Question 2

substance used to bring about a reaction

Answer 2

Reagent

Question 3

laboratory operation used to show the absence or presence of some substance, usually some ionic species

Answer 3

Test

Question 4

prepared from their nitrate or chloride salts

Answer 4

TS Cations

Question 5

test used to identify the ion that gives a characteristic result

Answer 5

Confirmatory test

Question 6

contains the ion or substance for which tests are made

Answer 6

Test Solution

Question 7

prepared from sodium or potassium salts

Answer 7

TS Anions

Question 7

not turbid

Answer 7

Clear Solution

Question 8

not colored

Answer 8

Colorless Solution

Question 9

can solutions be clear and colored?

Answer 9

Yes

Question 10

the solid that remains after
evaporating a mixture or solution to dryness

Answer 10

Residue

Question 11

any insoluble substance produced in a reaction

Answer 11

Precipitate

Question 12

adding water to a powder in limited amount at a time until it absorbs and swells, liberating heat and finally disintegrating into a fine powder

Answer 12

Slaking

Question 13

heating without fusion

Answer 13

Calcination

Question 14

External effects indicating reactions have taken place:
* Formation of a precipitate
* Dissolution of a precipitate
* Appearance and disappearance of color in a solution or in flame
* Evolution of gas
* Development of a characteristic odor

Answer 14

Analytical Reaction

Question 15

Conducted under strictly definite conditions:
1. Suitable medium
2. Temperature of the solution
3. Sufficiently high concentrations of a particular ion in solution
4. Prevent contamination of the reagents

Answer 15

Analytical Reaction

Question 16

1. Filtration
2. Precipitation
3. Decantation
4. Washing of precipitate
5. Testing of solubility of precipitate
6. Water Bath
7. Sand Bath
8. Evaporation
9. Precipitation with Hydrogen sulfide
   gas
10. Flame Test
11. Use of Buchner Funnel
12. Work involving gases

Answer 16

Laboratory Techniques

Question 17

utilize about 50 mg of solid & 1 mL of test solution

Answer 17

semi-micro analysis method.