what is volumetric analysia and qualitative analysis ? and what is the difference between these.

Md Ariful Islam

0 like 0 dislike
1 views
Share with your friends

1 Answers

Md Ariful Islam

Call
Volumetric analysis Volumetric analysis is a widely-used quantitative analytical method. As the name implies, this method involves the measurement of volume of a solution of known concentration which is used to determine the concentration of the analyte. Qualitative analysis Qualitative analysis is used to separate and detect cations and anion s in a sample substance. In an educational setting, it is generally true that the concentrations of the ions to be identified are all approximately 0.01 M in an aqueous solution. The 'semimicro' level of qualitative analysis employs methods used to detect 1-2 mg of an ion in 5 mL of solution.
0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Perform the qualitative analysis of unknown carbohydrates using the biochemical tests and identify the nature of the unknown carbohydrate.

Qualitative Tests for CarbohydratesName of the test Application1.     Molisch’s Test General test for carbohydrates2.     Anthone Test General test for carbohydrates3.     Iodine Test For glycan (starch, glycogen)4.     Barfoed’s Test To distinguish between mono-saccharides from reducing...

1 Answers 1 views
In the laboratory you dissolve 13.9 g of potassium hydroxide in a volumetric flask and add water to a total volume of 375 . mL. What is the molarity of the solution?

no. Of moles of potassium hydroxide = 13.9/56.1056 = 0.247 molesVolume = 375ml = 0.375LMolarity = no. Of moles/ volume Molarity = 0.247/0.375 = 0.658 M

1 Answers 1 views
WHAT IS THE MOLARITY OF A SOLUTION MADE BY DISSOLVING 2.51GRAMS OF SODIUM CARBONATE IN DISTILLED WATER AND MAKING IT UP TO 100ML WITH DISTILLED WATER IN A VOLUMETRIC FLASK

Moles =mass ÷molar massMass =2.51gMolar mass =106Moles = 0.0156875

1 Answers 1 views
A student pipets 20 mL of a 0.0187 M solution of KBr into a 250 mL volumetric flask and dilutes to the mark. What is the concentration of the resulting solution?

n(KBr) = C(KBr-initial solution)*V(pipet) = 0.0187 M * 0.02 L = 0.000374 mol C(KBr-resulting solution) = n(KBr) / V(flask) = 0.000374 mol / 0.25 L = 0.001496 M

1 Answers 1 views
All....have an error and an uncertainty associated with the measurement made using them. A.pipette B.burette C.Volumetric glassware D.balance and volumetric glassware

All volumetric glassware have an error and an uncertainty associated with the measurement made using them.

1 Answers 1 views
A 4.85 g sample of anhydrous sodium sulfate is dissolved in water and the solution made up to 250 cm3 in a volumetric flask. What is the concentration in mol dm−3 of sodium sulfate in the solution?

Concentration= amount of solute/volume im dm3Solution in dm3 = 250/1000 =0.25dm3now concentration in g/dm3=4.85/0.25 =19.4g/dm3Molecular mass of sodium sulfate is 142.04Now concentration in mol/dm3 becomes,19.4/142.04=0.13mol/dm3

1 Answers 1 views
Why should you never heat a volumetric flask, or add a hot solution to a volumetric flask?

Because it can be broken. Unlike round bottom flask, volumetric flask has local heating due to the tension in the glass.

1 Answers 1 views
Describe briefly the function of the primary X-rays and the analysing crystal as they are used in X-ray spectrography? this appeared in my qualitative analysis module

Analysis of the X-ray emission spectrum produces qualitative results about the elemental composition of the specimen. Therefore, it is used in the qualitative analysis of crystals.

1 Answers 1 views
<ol><li>Calculate the volume of the original sample needed if you would use a 50 mL volumetric flask, a 100 mL volumetric flask, and a 250 mL volumetric flask to prepare a dilution of 1:25.</li></ol>

Ratio 1:25 means that there have to be 1+25 = 26 equal parts.1) The volume of the original sample needed if we would use a 50 mL volumetric flask is...

1 Answers 1 views
why do we perform qualitative analysis

Answer: Qualitative analysis is performed to find out if an element, ion, functional group or compound is present in the sample. Methods of qualitative analysis provide information about chemical composition...

1 Answers 1 views
X