ooih oi hoi hoargaagNutrition Facts Okra Amount Per 100 grams Calories 33 2. % Daily Value* Total Fat 0.2 g 0% Saturated fat 0 g 0% Polyunsaturated fat 0 g Monounsaturated fat 0 g Cholesterol 0 mg 0% Sodium 7 mg 0% Potassium 299 mg 8% Total Carbohydrate 7 g 2% Dietary fiber 3.2 g 12% Sugar 1.5 g Protein 1.9 g 3% 3. Vitamin A 14% Vitamin C 38% Calcium 8% Iron 3% Vitamin D 0% Vitamin B-6 10% Vitamin B-12 0% Magnesium 14% 4. *Per cent Daily Values are based
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2 mL of water‚ cap the tube and shake. Let the mixture stand until two layers are formed. Remove the aqueous layer. Wash the organic layer two more times with exactly 2 mL of water (each time). After the final wash‚ dry the organic layer with calcium chloride pellets. Remove the ether with a pipette and filter through a funnel plugged with cotton into a pre-weighed 50 mL beaker including a boiling chip. Wash the pellets with a full pipette of ether. Remove the ether with a pipette and filter
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pigment will give a different color. This pigment can be used to indicate pH. pH is the -log[H+]. Acids increase the concentration of hydrogen ions ([H+]) in a solution and therefore have a low pH. A base will increase the concentration of hydroxide ions ([OH-]) (decreasing the [H+]) in a solution and will have a high pH. Notes: *Another household item from which a pH indicator can be extracted is Ex-Lax. Phenolphthalein is a commonly used indicator available from most chemical supply
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contain ingredients such as aluminum hydroxide‚ calcium carbonate‚ magnesium hydroxide‚ and sodium bicarbonate‚ alone or in various combinations. Antacid products may also contain other ingredients such as simethicone‚ which relieves gas. Antacids differ in how quickly they work and how long they provide relief. Those that dissolve rapidly in the stomach‚ such as magnesium hydroxide and sodium bicarbonate‚ bring the fastest relief. Antacids that contain calcium carbonate or aluminum dissolve more
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Extraction The first stage of processing is the extraction of the cane juice. In many factories the cane is crushed in a series of large roller mills: similar to a mangle [wringer] which was used to squeeze the water out of clean washing a century ago. The sweet juice comes gushing out and the cane fiber is carried away for use in the boilers. In other factories a diffuser is used as is described for beet sugar manufacture. Either way the juice is pretty dirty: the soil from the fields‚ some small
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which acid is reacted with the rocks to generate CO2. Calcium carbonate minerals contained within the rocks of Mars have quantities of CO2 which can be extracted using a double displacement reaction. Calcium Carbonate is an alkali‚ and when mixed with an HCI generates CO2. During the reaction hydrogen combines with one oxygen part of the Calcium Carbonate to produce H2O. Calcium reacts with the water element to produce an aqueous solution of Calcium Chloride CaCl2‚ therefor leaving Carbon and Oxygen
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IGCSE Chemistry 2012 exam revision notes by Samuel Lees Contents: 1. The particulate nature of matter 2. Experimental techniques 2.1 Measurement 2.2 (a) Criteria of purity 2.2 (b) Methods of purification 3. Atoms‚ elements and compounds 4.1 Atomic structure and the Periodic Table 4.2 Bonding the structure of matter 3.2 (a) Ions and ionic bonds 3.2 (b) Molecules and covalent bonds 3.2 (c) Macromolecules 3.2 (d) Metallic bonding 3 Stoichiometry 4
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extract. Onion has a characteristic smell. When a basic solution like sodium hydroxide is added To a cloth strip treated with onions then the smell cannot be detected‚ however an acidic solution does not destroy the smell of onion. Vanilla extract has a characteristic pleasant smell. If a basic solution like sodium hydroxide is added to it we cannot detect the characteristic smell of vanilla extract an
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OXIDATION AND REDUCTION Oxygen makes up only about 20% of the air‚ yet is the essential component for so many reactions. Without it fuels would not burn‚ iron would not rust and we would be unable to obtain energy from our food molecules through respiration. Indeed animal life on the planet did not evolve until a certain concentration of oxygen had built up in the atmosphere over 600 million years ago. The term oxidation has been in use for a long time to describe these and other reactions where
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Reaction with steam | Reaction with dilute acid | Reduction of oxides by carbon / carbon monoxide | Reduction of oxides by hydrogen | K | Forms oxides and peroxides | Violent‚ metal darts on surface of water‚ hissing sound‚ sparks formed; Metal hydroxide and hydrogen gas formed. | Very Violent reaction | Very Violent | No reaction (Metals are very reactive and form very stable oxides; A lot of energy is required to overcome the strong electrostatic forces of attraction between the ions) | No reaction
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