Chemical analysis

Chemical analysis

Designed By : Mr. ASHRAF MOSA MOHAMMED

^{Chemistry Department}

Ideas, questions and quizzes

Designed By : Mr. ASHRAF MOSA MOHAMMED

Detection for anions

• Anions of dilute hydrochloric acid

• Anions of Concentrated sulphuric acid

• Anions of Barium chloride solution group

Multiple Choice

CHOOSE :

Explain by balance chemical equation How can you differentiate practically by experiment between Sodium sulphite salt , Sodium sulphate salt:

• $$Na_2SO_{4\left(aq\right)_{ }}+BaCl_{2\left(aq\right)}\ \rightarrow\ BaSO_{4\left(s\right)}\ +\ 2NaCl_{\left(aq\right)}$$  

• $$Na_2SO_{3\left(s\right)_{ }}+2HCl_{\left(aq\right)}\ \rightarrow\ 2NaCl_{\left(aq\right)}\ +\ H_2O_{\left(l\right)}\ +\ SO_{2\left(g\right)}$$  

Multiple Choice

CHOOSE :

A anion will be a ............. ion.

Note : (Anions = Acid radical of salts)

• Negative

• Positive

• Neutral

• Fictitious

Multiple Choice

CHOOSE :

A cation is a ............. ion.

Note : (Cation = Basic radical of salts)

• Negative

• Positive

• Neutral

• Fictitious

Multiple Choice

CHOOSE :

Two types of chemical analysis

• Qualitative and Quantitative

• Identification and determination

• Detection

• All

Multiple Select

Multiple choice 

How many numbers of anions

• 6  anions  in group  dil HCl
  

• 4 anions  in group  Conc   $H_2SO_4$  

• 2 anions  in group  Barium  chloride

Multiple Choice

CHOOSE :

What is the test for carbon dioxide?

• Turns limewater cloudy

• Lights a glowing splint

• Bleaches damp litmus paper white

• Makes a squeaky pop

Multiple Select

CHOOSE :

When adding silver nitrate solution white ppt. is formed then turns violet in sun light soluble in conc. ammonia solution .

The Ion is ......

• Iodide I^-

• Bromide Br^-

• Chlorine Cl^-

• Phosphate PO₄^3-

Multiple Choice

CHOOSE :

Describe the melting and boiling points of pure substances

• One very specific temperature

• The temperature changes

Multiple Choice

CHOOSE :

In chemistry what is a "pure" substance?

• A mixture that has had nothing added to it and is in its "natural" state

• A substance made of a single element or compound

• A complex mixture designed as a useful product

• fuels, cleaning agents, paints, medicines, alloys, fertilisers and foods.

Multiple Select

Multiple choice :

Barium Sulphate is

• a white ppt.

• Insoluble in dil HCl

• Insoluble in water

Multiple Choice

CHOOSE :

What is chemical analysis ?

• The process of establishing what chemicals are present in a substance

• A process that has had nothing added to it and is in its "natural" state

• An instrumental analysis tool for identifying metal ions

• is considered one of the important branches of chemical science which plays an important role in science progress

Multiple Choice

CHOOSE :

To test for gas is to

• Observe the colour and odour of the gas

• Test with litmus paper

• Carry out specific test to identify gas

• All of the above

Multiple Choice

Think then choose:

A student is given five unknown solutions (A–E) and told they are sodium salts. The student only has dilute HCl

,some AgNO3

available, and no other lab equipment. The student adds dilute HCl

to one sample of each solution, and they add AgNO3

to a different sample.

The table below lists the observations seen for each reaction.

Which solution is likely to contain NaNO2?

• A

• B

• C

• D

• E

Multiple Choice

CHOOSE :

When a student adds a dilute hydrochloric acid to a sample of sodium sulphite to detect the sulphite ion, a colorless gas with a very irritating odor is evolved.

What is the name of this gas?

• Hydrogen sulphide gas

• Hydrogen gas

• Sulphur monoxide gas

• Sulphur dioxide gas

Multiple Select

MULTIPLE CHOICE :

All metal carbonate insoluble in water except

• Calcium carbonate

• Sodium carbonate

• Potassium carbonate

• Ammonium carbonate

Multiple Choice

A scientist wants to check for the presence of the bicarbonate anion.

They run the following experiment by adding:

• Na₂CO₃

• Na₂O

• Mg(HCO₃)₂

• MgCO₃

Multiple Choice

CHOOSE :

When adding silver nitrate solution to Salt solution black ppt. is formed .

Then the salt is : ......

• A

• B

• C

• D

Multiple Choice

CHOOSE :

All metal ......... soluble in water

• Sulpide

• Carbonate

• Bicarbonate

• Suphate

Multiple Choice

CHOOSE :

When adding dilute hydrochloric acid evolved bad smell, turns a paper wet with lead acetate to black

What formula is the unknown sodium salt likely to have?

• Na₃PO₄

• NaHCO₃

• Na₂S

• Na₂S₂O₃

Multiple Choice

CHOOSE :

How can you detecting A carbonate anion, which statement best describes the experimental procedure used to test for it ?

• Adding dilute NaOH

  ,which results in production of a gas that relights a glowing splint

• Adding an equal volume of dilute nitric acid, followed by silver nitrate, which gives a white precipitate

• Adding an aqueous ammonia solution, which produces a green precipitate

• Adding dilute hydrochloric acid, which results in production of a gas that turns limewater cloudy

Multiple Choice

CHOOSE :

How can you detecting A sulphite anion, which statement best describes the experimental procedure used to test for it ?

• Adding dilute HCl

  ,followed by heating, which results in production of a gas evolved which has a very irritating smell and turns a paper soaked in acidified aqueous K₂Cr₂O₇

  from orange to green.

• Adding an equal volume of dilute NaOH

  ,followed by heating, which results in production of a gas that turns moist litmus paper blue

• Adding an aqueous ammonia solution, which produces a yellow precipitate

• Adding an equal volume of dilute nitric acid, followed by silver nitrate, which gives a white precipitate

Multiple Choice

CHOOSE :

How can you detecting A Nitrate anion, which statement best describes the experimental procedure used to test for it ?

• Adding dilute HCl

  ,followed by heating, which results in production of a gas evolved which has a very irritating smell and turns a paper soaked in acidified aqueous K₂Cr₂O₇

  from orange to green.

• Adding an equal volume of dilute NaOH

  ,followed by heating, which results in production of a gas that turns moist litmus paper blue

• Adding Conc. Sulphuric acid that produce Brown vapour of nitrogen dioxide evolves due to the decomposition of the HNO₃

• Adding an equal volume of dilute nitric acid, followed by silver nitrate, which gives a white precipitate

Multiple Choice

CHOOSE :

Chemical analysis can be used to determine the amount of glucose present in a person.

In which scientific field is this analysis important?

• Environmental

• Industrial

• Medical

• Food chemistry

Multiple Choice

CHOOSE :

Chemical analysis can be split into two types: qualitative and quantitative.

Which statement best describes the difference between them?

• Qualitative analysis aims to identify the composition of a substance, whereas quantitative analysis aims to determine the mass, percentage composition, or concentration of a substance.

• Qualitative analysis can be used to identify the cation in a compound, whereas qualitative analysis can be used to identify the anion in a compound.

• Qualitative analysis aims to identify the chemical properties of a substance, whereas quantitative analysis aims to identify the physical properties.

• Qualitative analysis aims to determine the mass, percentage composition, or concentration of a substance, whereas quantitative analysis aims to identify the composition of a substance.

Multiple Choice

CHOOSE :

The brown ring test experiment to detect

• $Phosphate\ \ PO_4^{3-}$
  

• $Thiosulphate\ S_2SO_3^{2-}\$
  

• $Nitite\ \ NO_2^-$

• $Nitrate\ \ NO_3^-$

Multiple Choice

CHOOSE :

What's the colour precipitate that barium sulphate form ?

• No color

• Green

• White

• Cream

Multiple Select

MULTICHOICE :

What are the colours of bromine and iodine gases ?

• Bromine is orange fumes

• Bromine is orange red fumes

• Iodide is violet fumes

• Iodide is red fumes

Multiple Select

CHOOSE :

Silver phosphate soluble in

• Ammoinia solution

• dil HCl

• Clear lime water

• Nitric acid

Multiple Choice

What colour of lead II sulphate precipitate ?

• yellow-White ppt.

• yellow ppt.

• White ppt.

• Black ppt.

Open Ended

Compare :

How can you differentiate between

Sodium chloride , Sodium bromide AND Sodium iodide ?

Write your answer in the textbox

Poll

With my best wishes for luck

Mr. Ashraf Mosa Mohammad

ما هو تقييمك لأول اختبار تفاعلي على الإنترنت

With my best wishes for luck

25 January official language school in El-Arish

Mr. Ashraf Mosa Mohammed