Knowledge through ‘Innovation’…

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October.16-2016

My first day in Innovation hub. It was really fantastic. I thought that it is a class like that in the school. But, when I came and understand the matter, I changed my attitude. And also, it became very interesting to go there. Because, from there, we can understand and gather so many records and practicals knowledge, enjoy with friends and have lot of fun. If we come there, then we couldn’t even feel to go back to home. It has really that much of fun and knowledge. It’s all is because of our beloved Devadasan Sir.  He teaches every thing through good practical way. So, we can suddenly catch the things. Today we studied about fundamental and derived unit.

                                                                                                         After that, we studied the uses and handling method of some devices in chemistry lab.

 

BURETTE

 

A burette (also buret) is a device used in analytical chemistry for the dispensing of variable, measured amounts of a chemical solution.

 

PIPPETTE

 

A pipette (sometimes spelled pipet) is a laboratory tool commonly used in chemistry, biology and medicine to transport a measured volume of liquid, often as a media dispenser.

 

ELECTRONIC BALANCE

An electronic balance is a device used to find accurate measurements of weight.

 

 

 

BUNSEN BURNER

A Bunsen burner, named after Robert Bunsen, is a common piece of laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion

 

 

CONICAL FLASK

Also known as an Erlenmeyer flask, a conical flask is a glass vessel used in chemistry laboratories, and it has a wide flat bottom that tapers up into a narrow cylindrical neck. They’re usually used for mixing liquids.

 

BEAKER

A beaker is a simple container for stirring, mixing and heating liquids commonly used in many laboratories

 

 

STANDARD FLASK

A standard flask (measuring flask or graduated flask) is a piece of laboratory glassware, a type of laboratory flask, calibrated to contain a precise volume at a particular temperature. Standard flasks are used for precise dilutions and preparation of standard solutions

 

 

MEASURING JAR

A measuring jar is used in a laboratory for measuring exact quantities of a liquid.

 

 

BAREL PIPPETTE

The barel pippette is used for the drop transfering of chemicals. So, we can use less quantity for more people.

 

By studying these things, my first day in Innovation hub finished.

 

Knowledge from Physics…

 

My fifth day in Innovation hub. Today, we did some Physics experiments. For the first time, I had seen and handled the Vernier calipers.

Vernier Calipers A vernier scale is a device that lets the user measure more precisely than could be done unaided when reading a uniformly divided straight or circular measurement scale. It is a scale that indicates where the measurement lies in between two of the marks on the main scale. Pierre Vernier (19 August 1580 at Ornans, Franche-Comté, Spanish Habsburgs (now France) – 14 September 1637, same location) was a French mathematician and instrument inventor. He was inventor and eponym of the vernier scale used in measuring devices               It was really fantastic. We measured the volume of a rectangular prism using the vernier calipers.We also founded the least count of it. It was 0.02 mm.                                                                                       After the noon, we did a experiment by introducing the moment bar. We made a moment bar with a metre scale and some slotted weights.         From this experiment, we founded the weight of the given material by changing the slotted weights and distance. Thus, the fifth day of Innovation hub finished.

Flame test knowledge

 

My fourth day in Innovation.Today, we did some simple tests for detection of cations in salts.

We did so many experiments today. From these all experiments, the flame tests was very interesting. It was for some certain metal ions.It was really wonderful and beautiful.

 

Thus, by doing practical things, our fourth day of Innovation hub had finished.

Knowledge gathering continues….

 

My second day in Innovation hub. Today, I loved my hated subject. It’s Biology. I don’t like biology. But, from the practical section we have done, I like it some more than before. Because, it’s really interesting to go and discover the tiny particles of cells in greenary and even inside us.

                                                     Today, we did the transverse section of monocot and dicot stem. To observe it, we need a microscope. So, we first studied the parts of microscope.

 

 

By studying this, we went to the monocot and dicot stem. It was really wonderful experience.

 

  

 

                                                 After that, we did some simple tests for Anions(Acid radicals) in salt.

 

                                                          From those experiments,we can really understand about different salts in anions.

                     ”  We did the tests for carbonate. To a little of salt, we added diluted Hcl and let the gas to another test tube containing lime water. Suddenly, the liquid changed into milky-in-colour. This is due to CO2.

It turns the lime water milky due to the formation of insoluble calcium carbonate which is white.”

                                                              This is my first experience in the chemistry lab. This is my first inference which I reach by doing practical.So, this is the unforgettable day in my life.

 

Tomato titration!….

Today we did the last chemistry project.It was to find the total acid content of the ripe tomato fruit.How can we find it ?? There are so many different types of acid in the tomato.How can we find the amount of oxalic acid alone ??

                   

I got the answer for these questions. First the total acid content is found.Then the oxalic acid is estimated by the titration against pottasium permagnate.

Titration of tomato juice with sodium hydroxide (using phenolphthalein indicator)

1. Squeeze the tomato and strain the tomato juice to remove any pulp.
2. Measure exactly 25 mL of tomato juice into the 250 mL conical flask using the pipette.
3. Add about 75 mL of distilled water to the tomato juice.
4. Add a few drops of phenolphthalein indicator to the tomato juice and distilled water (the solution should remain clear).
5. Fill the burette to the top calibration mark with the sodium hydroxide solution.
6. Add the sodium hydroxide solution to the tomato juice until the phenolphthalein indicator turns red, indicating that the endpoint has been reached, and record the amount of sodium hydroxide used.
7. Repeat steps 2 to 6 three times, refilling the burette and cleaning the conical flask each time.

This day in innovation had also finished…

Sound experiment……

Hi ,

Today we did an experiment based on sound.It is to find the velocity of sound in air at room temperature.we used a resonance column for this.Resonance is indicated by the sudden increase in the intensity of the sound when the column is adjusted to the proper length. The resonance is a standing wave phenomenon in the air column and occurs when the column length is: λ/4, 3λ/4, 5λ /4.

        

 

By using this apparatus the velocity of sound in the air which we found was = 315.61 ms-1.

It was more interesting to do this experiment because a new sir came to teach about it. He was very active and encouraged us all the time…Thus,I like this day..

Save the chemicals too…..

Today, we did an innovative method of titration by using only minimum chemicals….Yes, as you know, it is the microscale experiment. Then, for remembering you all, I’m just showing you something on it.Microscale Chemistry (often referred to as Small-Scale Chemistry)  is an analytical method and also a teaching method widely used at school and at university levels, working with small quantities of chemical substances.

                                       

                                                                                  With this method,we estimate the concentration of the given sodium hydroxide provided with hydrochloric acid and a barrel pipette. The only disadvantage of this method is its not that much accurate.But it can be well used for approximate estimation…. Thus,this day in innovation had also finished….

                             . 

Citric lemon!!….

 Today, we did an wonderful experiment. It is to estimate the acid content in lemon. By hearing this, I became very happy..Did you know why??When I heard that lemon contains acid, my next question was that, how can we estimate it??

        

Now, I had a golden oppurtunity to do and prove that experiment.So I am really happy…..

Titration of freshly squeezed lemon juice with sodium hydroxide (using phenolphthalein indicator)

1. Squeeze the lemons and strain the lemon juice to remove any pulp.
2. Measure exactly 25 mL of lemon juice into the 250 mL conical flask using the pipette.
3. Add about 75 mL of distilled water to the lemon juice.
4. Add a few drops of phenolphthalein indicator to the lemon juice and distilled water (the solution should remain clear).
5. Fill the burette to the top calibration mark with the sodium hydroxide solution.
6. Add the sodium hydroxide solution to the lemon juice until the phenolphthalein indicator turns red, indicating that the endpoint has been reached, and record the amount of sodium hydroxide used.
7. Repeat steps 2 to 6 three times, refilling the burette and cleaning the conical flask each time.

  Thus, the amount of citric acid per gram of the lemon fruit which we did was 0.01314 gm.Then, this day also finished……

 

 

 

Ohm’s…….

Hello!!!!Every one…Today, we did an experiment to verify the Ohm’s law.Now, someone knows about Ohm’s law. But, I am just remembering you all once more…

                                 Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance,^[1] one arrives at the usual mathematical equation that describes this relationship:

                                 I=V/R

where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm’s law states that the R in this relation is constant, independent of the current.

                  Thus, by plotting the graph, this day in innovation hub had also finished…..

Have a nice day!!

Variation of viscosities ……?

Hi, every one!!!….Today, I had came before you with a new unknown experiment. It’s unknown to me. But, it may be known to all of you….Yes, it’s to study the variation of viscosity with concentration….Did you know??Using this, we identified the concentration of an unknown solution….The viscosities of different concentrations can be composed by noting the flow time on a ostawald viscometre…..Then, what is that????

                              

Ostwald viscometer, also known as U-tube viscometer or capillary viscometer is a device used to measure the viscosity of the liquid with a known density. The method of determining viscosity with this instrument consists of measuring the time for a known volume of the liquid (the volume contained between the marks A and B) to flow through the capillary under the influence of gravity. Ostwald viscometers named after the German chemist Wilhelm Ostwald (1853-1932).

Hope you all would have understood something about it….