of a 4.0% cobalt (II) chloride solution? 7. A saline solution is 0.9% NaCl. What mass of NaCl and water would be required to prepare 50 L of this saline solution? 8. What mass of H2SO4 is contained in 60.00 mL of 5.85 % solution of sulfuric acid? 9. How much water would you have to add to 2.402 kg of nickel(II) sulfate in order to make a 25% solution? 10. What mass of calcium chloride should be dissolved in 590.0 g of water in order to produce a 0.82 %
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of the line y = mx + b which would be attained from a calibration curve. And Beer Lambert law: . Experimental Procedures To prepare the standard iron solution weighed 0.0351 g of ferrous ammonium sulfate and added 1.25 mL of sulfuric acid. We added distilled water to make 500 mL. We dissolved 0.1005 g of 1‚10-phenanthroline in a 100 mL volumetric flask. We then prepared 25 mL hydroquinone solution containing 0.2510 g of hydroquinone. In a 250 mL volumetric flask 6.2515 g of
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ACIDS AND BASES The reason that acid-base reactions are so important is that many of the things you come into contact with on a daily basis are either acids or bases. Most fruits are acids‚ as are carbonated beverages‚ tea‚ and battery acid. Common household bases include baking soda‚ ammonia‚ soap‚ and antacids. What are acids and bases? There are not one but three common definitions used to describe acids and bases: 1. Arrhenius acids and bases 2. Brønsted-Lowry acids and bases 3. Lewis acids
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7. What is the mass of 2.41 x 1024 molecules of water? 8. What is the formula mass (molar mass) of ammonium nitrate? 9. How many moles are in 56.2 grams of bromine gas? 10. What is the mass of 2.67 moles of sulfuric acid? 11. What is the mass of 3.5 moles of sodium sulfide? 12. Calculate the mass of 0.354 moles of ammonia‚ NH3. 13. Calculate the mass of 3.54 moles of sodium chloride. 14. Calculate the number of molecules of H2S
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Chemical Nomenclature refers to the naming systems used with chemical formulas. This worksheet focuses on the most basic chemicals and nomenclature systems. Please read the information concerning each problem set and then attempt the problems associated with that information. The simplest compounds contain just two elements. Sodium chloride‚ NaCl‚ is an example of a binary compound. Several other examples are listed below. Potassium bromide KBr Calcium bromide CaBr2 Lithium fluoride LiF
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concentrations. · High levels of nitrogen have contributed in increase of acid rain events. · Nitrogen dioxide has been directly linked with the formation of photochemical smog The increasing concentration of oxides of nitrogen can be more easily identified through the effects of acid rain. (as nitrogen oxides contribute heavily in the formation of acid rain‚ therefore an increase in regularity and severity of acid rain events‚ can be directly linked to large quantities of nitrogen oxides :
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the final product was calculated followed by recrystallization and melting point was measured. Introduction: Nitration of Methyl Benzoate is one of the examples of Electrophilic aromatic substitutions. The use of a mixture of Sulfuric Acid and Nitric Acid is the classic way to make NO2+. The two main reaction types used for this are both substitutions: Electrophilic Aromatic Substitution and Nucleophile
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involves the nucleophilic addition of an organomagenesium complex to a carbonyl carbon followed by acid work-up. This reaction involves a single electron transfer between the carbonyl group and the grignard reagent. Once the Grignard reagent is synthesized it can work as a base by abstracting a proton or it can work as a good nucleophile. When it works as a base it can be added to water‚ alcohols‚ amines‚ acids‚ terminal alkynes and etc. When it works as a nucleophile‚ its nucleophilicity reacts with the
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________________________ Internal Assessment Criteria Aspect 1 Aspect 2 Aspect 3 Total DCP CE Aim: The aim of this practical is to plot and investigate the pH titration curves for the titration of a strong acid with a strong base and of a weak acid with a strong base‚ and find Ka of the weak acid. Procedure: Part I 1. Pour 30 ml of the HCl solution of unknown concentration in a 100 ml beaker. 2. Add a stirring magnet. 3. Place the beaker on the magnetic heater and activate the rotating motor but not
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sure not to touch the hotplate‚ and also to use tongs when picking up a hot beaker. In order to create successful chemical reactions‚ we followed the procedures properly. We started with a small amount of cooper powder in a beaker‚ and added nitric acid to it while the beaker was under a fume hood. We removed the beaker as soon as it was safe to and next we added 25mL of water to the current blue solution. We then added sodium hydroxide to the beaker and then proceeded to place the beaker on to a
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