some basic concepts of chemistry class 11- basic concepts of chemistry book

STARCH EXTRACTION FROM POTATO PRACTICAL / EXPERIMENT  Starch is found in a lot of naturally occuring food items mostly those which are rich in carbohydrates like Potato, rice etc. Like potato, starch can also be extracted from rice. But here we will discuss the extraction of starch from potato including the chemistry and reasons behind each step.    REQUIRED EQUIPMENT : APPARATUS:                                                                    SUBSTANCES AND REAGENTS 1- Beaker                                                                            1-Potato 2-Water Bath                                                                      2-Ethyl Alcohol   3-Funnels                                                                           3-NaCl solution 4-Filter papers                                                                   4- 0.01M NaOH  5-Test Tubes                                                                      5- Conc. H2SO4 6-Muslin cloth                       

MOLE CONCEPT NOTES  => What is the term Mole in chemistry? For buying or purchasing we always need some standards values. In other words, we take 1Kg of flour, 200ml of water or 1 dozen bananas. These terms are used in everyday life. But what if I want to measure the number of tiny particles present in it? Let me explain this in detail.! APPLICATION OF MOLE CONCEPT Looking at a Glass of water can you tell that how many water molecules are present in it? You will probably say it is impossible to calculate the number of molecules in a glass of water. But astonishingly chemistry has an answer to this question as well.😊😊 That brings us to the concept of MOLE. What does mole mean?😕 Its very easy.😊 1Mole of anything has 6.022times10^23 atoms or molecules or particles present inside it. Isn't this number huge? If i have to write down the zeros this is how the number will look like : 602200000000000000000000000  1Mole of  anything has these many particles.  Now take a substance whic