Question

PRE-LAR STUY GESTIONS The Solution is Dilution LA 20 You must read the experiment and then werde n 1. Look at the procedure for amount of liquit of the y o u 2. If you have a 50.00 ml. volumetric raskask a ta specife womendappe that measures up to 10-ml, with marks to the nearest 1/10 ml. how much more word you add to the flask to make 5000 mlofaS005 solution? 3. The 3,00 % solution needs to be diluted to make 10.00 mL of a 2.00% solution. What volume of 5.00% solution should be used? 4. Calculate What % corresponds to the following fractions? _% 5. Your pipet reads as the picture to the right. How should you record your answer? CHEM10 - Laboratory Manual/Lab 20 - Rancho & Chino Campus

Answer 1

HR if If you have som Volumetric flank marked at a specific pente volume & pipette that menure upto lomb with arns to the nearest yo ml. how much solute would you add to the flask to make som of 8 % solution. Total volume make up of solution - some we have 54. solution so it means 5 soln prepared in some solution je 5.59 = 2.5mL - Top 2.5mL solute add in some solution. to of a do Why should you not force the - amount of lighid out of the last remaining pipet Sol Became the volumetric pipets are a manner that takes into the remains at the tip due to the Tension. Calibrated solution surface

Calculate what corresponds to the following fraction L . 4. gion - 5 we convent lntito loo 801" Ixloos_205) - so 2010 fraction ----- x 100 = 507: _ sol fraction x 100 70-4 70% faction - The riot. solution need to diluted to make TomL of a 2.001 solution. what volume of 5.00 of solution should be med. 20/0 solution of make up volume. 10mL we have st solution So require formula vх Ср ---С- tsh 10x 24 Un L Solution of 54 Tooxs bo =

E ANSS 0 Remember the number steat at o.o on top & gosto - botten. 2 The curved surface at the top of huid level's called meniscus- & read the liguld level wing the bottom of the meniscus 1 part of the structure of meniscus involves reflection of light & merisas you see depend upon the background Boret reads 1.4mL.