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Dr. Ali Ebneshahidi
Dr. Ali Ebneshahidi

...  Electrolytes = compounds that release ions when dissolved in water (e.g. NaCl + water → Na+ + Cl- ).  Acids = electrolytes that release H+ (e.g. H2 CO3 → H+ + HCO3- ).  Bases = electrolytes that release anions that can combine with H+ (e.g. NaOH → Na+ + OH- ).  Salts = substances formed by the ...
Chemistry Exam Review 2
Chemistry Exam Review 2

... 10) Calculate the mass of oxygen gas that reacts with 23.4g of HBr(aq) in the following reaction: 4HBr(aq) + O2(g)  2Br2(aq) + 2H2O(l) 11) a) Sodium carbonate reacts with hydrochloric acid to produce carbon dioxide gas, water and sodium chloride solution. Calculate the mass of sodium chloride that ...
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Solubility Main article: Solvation The ability of one compound to

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... 27. What is the solubility of sodium nitrate at 30oC? 28. A saturated solution of potassium nitrate is formed from 100 g of water. If the saturated solution is cooled from 80oC to 50oC, how many grams of precipitate are formed? ...
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... Complete the equation below (with phases) and balance it. K2S(aq) + AgNO3(g)  If you combine 10.21 mL of 0.152 M K2S with 1.0092 g AgNO3, how much solid product can be formed? If 0.2744 g of product were actually formed, what is the percent yield? ...
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... via a barometer. A barometer measures the displacement of a column of mercury by air pressure. Standard pressure is 760 mm of mercury or 1 atmosphere (atm), specifically; the air pressure at sea level supports a column of mercury 760 mm high. Today’s technology uses this basic measurement to calibra ...
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Unit C3 - Chemistry In Action

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... 1. One of the main ingredients of pearls is calcium carbonate. If pearls are put in an acidic solution, they dissolve. CaCO3 + HCl  CaCl2 + H2O + CO2 How many moles of CaCO3 can be dissolved in .0250 mol HCl? ...
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The Solubility of Potassium Sulfate in Thermodynamic view

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HYDROGEN PEROXIDE 20%-50%

... containers, or cool with large quantities of water. Stay upwind. Keep at a safe distance in a protected area. Never approach containers which have been exposed to fire, without cooling them sufficiently. Unusual fire and explosion hazards: Oxygen released on exothermic decomposition may support comb ...
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... 2) The atom that can make the most bonds is the central atom. 3) Fill up the outer atoms first. 4) Place any remaining electrons on the central atom. 5) If the central atom isn’t satisfied then use the outer atoms electrons to make double/triple bonds to the central atom. ...
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... defined atmospheric pressure at sea level, 1 atmosphere. At that temperature, the vapor pressure of the liquid becomes sufficient to overcome atmospheric pressure and lift the liquid to form bubbles inside the bulk of the liquid. The standard boiling point is now (as of 1982) defined by IUPAC as the ...
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PH



In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.pH measurements are important in medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, nutrition, water treatment & water purification, and many other applications. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement.Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode.The pH of aqueous solutions can be measured with a glass electrode and a pH meter, or indicator.pH is the negative of the logarithm to base 10 of the activity of the (solvated) hydronium ion, more often (albeit somewhat inaccurately) expressed as the measure of the hydronium ion concentration.The rest of this article uses the technically correct word ""base"" and its inflections in place of ""alkaline"", which specifically refers to a base dissolved in water, and its inflections.
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