Aim: To determine the water of crystallization in washing soda crystals (Na2CO3.xH2O) Research Question: What is the percentage composition and the amount (in moles) of water in the given ionic hydrate? (Na2CO3.xH2O) Background Information: Sodium Carbonate also known as Washing Soda (Na2CO3.xH2O) is a sodium salt of carbonic acid. Sodium carbonate is domestically well known for its everyday use as a water softener. It is also used to remove grease‚ oil and wine stains. It can be extracted from
Premium Hydrochloric acid Sodium carbonate Sodium chloride
with definitions and detailed graphs‚ we are hopeful this information is both useful and informative. Filter Types Monolithic Crystal Filters 2 Quartz resonator internally coupled utilizing piezoelectric effect. Discrete Crystal Filter Single quartz resonator with external components utilizing the piezoelectric effect. Notch filters Crystal or Discrete component filter that passes all frequencies except those in a stop band centered on a center frequency. High Pass Filters
Premium Signal processing Frequency
carbonate ion as it is more electronegative. The resulting copper (II) sulphate solution when cooled can easily crystalize which is in the solid form and the amount of product can be accurately measured by using electronic balance to get the mass of the crystal formed. The experiment is carried out to calculate the percentage yield of the salt formed. The percentage yield is the percentage of purity of the product that we want and the actual yield is always less than the theoretical value as there
Premium Sulfuric acid Sulfur Carbon
that are two or three layers thick. C. What is the purpose of crystal violet in the Gram’s stain procedure? The crystal violet increases the contrast of both gram-negative and gram-positive bacteria making them appear purple. D. What is the purpose of iodine in the Gram’s stain procedure? (What is a mordant?) The iodine helps set the stain by forming an insoluble crystal violet-iodine complex. Basically helps retain the crystal violet to the cell. E. What is the purpose of acetone-alcohol
Free Bacteria Staining Gram staining
safranin purple‚ crystal violet red‚ safranin red‚ crystal violet 4. What is the function of the mordant iodine in a Gram staining procedure? A mordant causes the crystal violet to run. A mordant fixes the bacteria to the slide. A mordant keeps dye attached to an object. All of the above 5. What is the order of reagents used in the Gram stain? crystal violet‚ iodine‚ safranin‚ alcohol alcohol‚ crystal violet‚ iodine‚ safranin iodine‚ crystal violet‚ safranin‚ alcohol crystal violet‚ iodine
Premium Staining Microscope Bacteria
In this experiment‚ 5.281g of trans isomers of [Co(en)2Cl2]Cl was synthesized from 12.249g of CoCl2▪6H2O. First‚ CoCl2▪6H2O was reacted with ethlenediamine (NH2CH2CH2NH2) that formed [Co(en)2(H2O)2]Cl. Then the [Co(en)2(H2O)2]Cl was reacted with H2O2 to change the cobalt’s charge to cobalt(III) from cobalt(II). Finally HCl was added into the solution to form [Co(en)2Cl2]Cl. The percent yield was 45.51%.To synthesis trans isomers of [Co(en)2Cl2]Cl‚ distilled water was first mixed with CoCl2▪6H2O‚
Premium
temperature drops‚ crystals will form. Before filtration moisten the filter paper with small amount of boiling water and after filtration rinse filter paper with 2-3 mL of boiling water to dissolve any crystals that may have formed 9. Remove the flak from the hotplate and allow filtrate to cool to room temperature. Once temperate is reached‚ check for crystal formation. If no crystals‚ gently scratch the inner wall of flask with a stirring rod to help induce crystals. After initial crystal formation‚ cool
Premium Erlenmeyer flask Laboratory glassware Water
take a melting point for reference) • add a boiling chip or boiling stick (otherwise‚ it may "bump" and spill) • use a minimum amount of hot solvent (Add a bit‚ heat/swirl. Not dissolved? Add more!) NOTE: IF YOU USE TOO MUCH SOLVENT‚ YOU WILL GET NO CRYSTALS! 3) ONLY IF NEEDED: Decolorize • most pure compounds are white and give colorless solutions (looks like water) • to remove color (really trace contaminants)‚ add activated charcoal (adsorbs the impurities) 4) ONLY IF NEEDED: Gravity filter to remove
Free Solubility Solid Crystal
flask‚ (3ml) of propanol was added‚ heated and cooled. Filteration was tried once more to gain crystals. Due to nonexistent crystals a melting point could not be performed. Observations: We noticed after adding propanol our solution became very orange and cloudy. After heating it the solution was a clear golden color. We chilled the solution in ice and attained no crystals. After repeatedly heating and cooling‚ we saw our solution go from cloudy to clear over and over
Premium Chemistry Filters Sodium
dolphin (Tursiops truncatus) along Crystal Cove‚ CA and use of Newport Harbor‚ CA. Lindsay S. King (Student Director CDSP) and Dennis L. Kelly‚ Professor & Project Director. Marine Science Department‚ Orange Coast College‚ 2701 Fairview Rd‚ Costa Mesa‚ CA 92628 INTRODUCTION Photo by Dennis Kelly Photo by Sgt. Hollenbeck Photo by Lindsay King Photo by Google Maps A land based study of the behavior and ongoing use of Newport Harbor and Crystal Cove‚ CA by Coastal Bottlenose Dolphins
Premium Dolphin Dorsal fin Great white shark