pH paper or a pH meter. 6. Low pH values mean high acidity (or low alkalinity). 7. High pH values mean high alkalinity (or low acidity). 8. Substances with pH values < 7 : acidic; pH values = 7 : neutral; pH values > 7: alkaline. 10.3 Acids and Corrosion 1. Dilute acids react with some metals and produce hydrogen. 2. Test for hydrogen: Put a burning splint near the mouth of a test tube containing the gas. If the gas is hydrogen‚ it burns with a ’pop’ sound. 3
Premium PH Acid Base
OXIDATION-REDUCTION TITRATIONS REDOX TITRATION • involves oxidizing agents and reducing agents titrants and analytes • oxidizing agents used as standard solutions: potassium permanganate‚ KMnO4 potassium dichromate‚ K2Cr2O7 iodine‚ I2 ceric sulfate‚ Ce(SO4) 2 potassium iodate‚ KIO3 REDOX TITRATION • reducing agents used as standard solutions: ferrous sulfate‚ FeSO4 oxalic acid‚ H2C2O4 sodium oxalate‚ Na2C2O4 sodium thiosulfate‚ Na2S2O3 titanous chloride
Free Titration Potassium permanganate Oxidizing agent
because they do not ferment lactose‚ so they grow red. LIA and TSI confirm if salmonella is growing on BGA. Spinach sample B tested positive during the LIA and TSI tests. Sample A tested positive for glucose fermentation (TSI test) but negative for alkaline production (LIA). Sample A shows that there can be flaws in this process‚ since salmonella was detected in one test but not the other. The cause of the this could have been improper inculcation‚ lack of growth or contamination. In this lab salmonella
Premium
10.0 EXPERIMENT ON DETERMINATION OF DISSOLVED OXYGEN Sl. No. Contents Preamble 10.1 Aim 10.2 Introduction 10.2.1 Environmental Significance 10.3 Principle 10.4 Materials Required 10.4.1 Apparatus Required 10.4.2 Chemicals Required 10.5 Sample Handling and Preservation 10.5.1 10.6 Precautions Procedure 10.6.1 Preparation of Reagents 10.6.2 Testing of Water Sample 10.7 Calculation 10.7.1 Table 10.7.2 Data Sheet 10.8 Interpretation of Results 10.9 Inference 10.10 Evaluation
Premium Water Oxygen
A) Growth plate and Endochondral ossification: In order to maintain a healthy skeletal system which is crucial for different organs such as respiratory system‚ brain‚ spinal cord and heart‚ it is very important to have a good development of the skeletal system. Endochondral ossification is the process through which the axial and appendicular skeletons are formed through the formation of a cartilage inter-mediate. A good model for endochondral ossification is the limb bud where the precursor cells
Premium Stem cell Cell Cellular differentiation
Microcystis is a genus of freshwater cyanobacteria‚ including 22 main European and tropical morphospecies such as Microcystis aeruginosa‚ flos-aquae‚ and wesenbergii (Komárek and Komárková‚ 2002). Microcystis is a unicellular colony-forming genus. Because Microcystis cells contain gas vesicles‚ they are buoyant‚ which allows for the formation of surface scums. These high density surface scums are associated with a plethora of negative environmental consequences‚ including production of the hepatotoxin
Premium Bacteria Immune system Water
Introduction Gaucher disease was first recognized by the French doctor Philippe Gaucher‚ who originally described it in 1882 and lent his name to the condition. It is an autosomal recessive genetic disorder caused by a lack of the enzyme glucocerebrosidase (“NINDS”). When this enzyme is not present‚ there is an accumulation of lipids in cells and certain organs. This accumulation can lead to further problems such as enlargement of the spleen and liver‚ painful bone lesions‚ swelling of lymph
Premium
1.0 Introduction Working presently as Senior Assistant Medical Officer at the Department of Psychiatry and Mental Health‚ I had been in this profession since 1982. Global warnings over diabetes increase. Research carried out by the International Diabetes Federation (2009) reveals that around 314 million people‚ equating to 8.2% of the global adult population‚ may have impaired glucose tolerance (IGT) which is a condition that often precedes the development of diabetes. The incidence of
Premium Diabetes mellitus Insulin Diabetes
Sodium hydroxide‚ also known as caustic soda‚[2][3] or lye‚ is an inorganic compound with the chemical formula NaOH (also written as NaHO). It is a white solid‚ and is a highly caustic metallic base and alkali salt. It is available in pellets‚ flakes‚ granules‚ and as a 50% saturated solution.[citation needed] Sodium hydroxide is soluble in water‚ ethanol and methanol. This alkali is deliquescent and readily absorbs moisture and carbon dioxide in air. Sodium hydroxide is used in many industries
Premium Sodium hydroxide
The Effects of Acid Rain on Plant Growth PURPOSE The purpose of this experiment was to determine to what degree acid rain affects the growth of certain plants. I became interested in this idea because I’m worried about our environmental conditions and it sounded very interesting to me. The information gained from this experiment may be used to as a warning to stop air pollution. HYPOTHESIS My hypothesis is that the plant watered with the acid solution will grow more slowly than plant’s
Premium Water Acid Acid rain