Analytical Chemistry
... Calculate the molar concentration of Ag+ in a solution having a pAg of 6.372 . pAg = - log[Ag+] = 6.372 log[Ag+] = -6.372 = - 7.oo + 0.628 [Ag+] = antilog ( -7 ) * antilog ( 0.628) = 10-7*4.246 ...
... Calculate the molar concentration of Ag+ in a solution having a pAg of 6.372 . pAg = - log[Ag+] = 6.372 log[Ag+] = -6.372 = - 7.oo + 0.628 [Ag+] = antilog ( -7 ) * antilog ( 0.628) = 10-7*4.246 ...
Chem 106 Week 10.2017
... Hydrochloric acid + sodium hydrogen carbonate __ HCl(aq) + _ NaHCO3 (s) ...
... Hydrochloric acid + sodium hydrogen carbonate __ HCl(aq) + _ NaHCO3 (s) ...
Part II - American Chemical Society
... b. Would the A factor for the chemical reaction NO(g) + N2O(g) → NO2(g) + N2(g) be expected to be larger or smaller than the A factor in the above reaction if each reaction occurs in a single step? Outline your reasoning. c. Calculate the rate constant for this reaction at 75 ˚C. d. The following tw ...
... b. Would the A factor for the chemical reaction NO(g) + N2O(g) → NO2(g) + N2(g) be expected to be larger or smaller than the A factor in the above reaction if each reaction occurs in a single step? Outline your reasoning. c. Calculate the rate constant for this reaction at 75 ˚C. d. The following tw ...
CHAPTER 1 -Chemistry -Matter -Elements -Atoms
... 2) A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. Based on these observations, can you determine whether A and ...
... 2) A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. Based on these observations, can you determine whether A and ...
Extended Abstract Template
... Solid phase extraction (SPE) is a widely used extraction method in sample preparation and pre-concentration because of high concentration factor. It is normally performed using either cartridge or disc format. However, commercially available SPE sorbent is relatively expensive and SPE process is les ...
... Solid phase extraction (SPE) is a widely used extraction method in sample preparation and pre-concentration because of high concentration factor. It is normally performed using either cartridge or disc format. However, commercially available SPE sorbent is relatively expensive and SPE process is les ...
EKSIKA JOINT EVALUATION TEST. Kenya Certificate
... Hydrogen peroxide decomposes according to the equation below; H2O(l) →H2O(l) + ½ O2(g) ; ∆H = -98KJ/mol. If 6.8g of hydrogen peroxide contained 75cm3 of solution with water were completely decomposed, determine the rise in temperature due to the reaction.(Specific heat capacity of water =4.2Jg-1K-1 ...
... Hydrogen peroxide decomposes according to the equation below; H2O(l) →H2O(l) + ½ O2(g) ; ∆H = -98KJ/mol. If 6.8g of hydrogen peroxide contained 75cm3 of solution with water were completely decomposed, determine the rise in temperature due to the reaction.(Specific heat capacity of water =4.2Jg-1K-1 ...
Chemical Reactions Chemical Arithmetic
... • 1) Write an unbalanced equation, using correct formulas for all reactants and products • 2) Add appropriate coefficients to balance the numbers of atoms of each element • 3) Check equation to ensure the #s and types of atoms are the same on both sides of the equation • 4) Make sure the coefficient ...
... • 1) Write an unbalanced equation, using correct formulas for all reactants and products • 2) Add appropriate coefficients to balance the numbers of atoms of each element • 3) Check equation to ensure the #s and types of atoms are the same on both sides of the equation • 4) Make sure the coefficient ...
Ch. 6 - Chemical Bonds I. Why Atoms Combine
... Write the names of both elements. Change the final ending to -ide. ...
... Write the names of both elements. Change the final ending to -ide. ...
Preview Sample 1
... 102) Alaska Natives have a lower incidence of heart disease even though their diets are high in fat and cholesterol. This may be due to the large amount of ________ in their diets. A) steroids B) omega-3 fatty acids C) triglycerides D) prostaglandins E) oleic acid ...
... 102) Alaska Natives have a lower incidence of heart disease even though their diets are high in fat and cholesterol. This may be due to the large amount of ________ in their diets. A) steroids B) omega-3 fatty acids C) triglycerides D) prostaglandins E) oleic acid ...
Experiment 9
... great so that the forces of interionic interaction manifest themselves appreciably even at low concentration of an electrolyte. As a result, the ions are not completely free. This is why the state of ions in a solution is described, in addition to their concentration, by their activity, i.e. the con ...
... great so that the forces of interionic interaction manifest themselves appreciably even at low concentration of an electrolyte. As a result, the ions are not completely free. This is why the state of ions in a solution is described, in addition to their concentration, by their activity, i.e. the con ...
CHAPTER 6: Earth science
... 1. The following photograph shows the result of adding a colourless solution of silver nitrate to a colourless solution of sodium chloride in a test tube. (a) A white precipitate forms. Define the term ‘precipitate’. An insoluble solid forms when two solutions are mixed. ...
... 1. The following photograph shows the result of adding a colourless solution of silver nitrate to a colourless solution of sodium chloride in a test tube. (a) A white precipitate forms. Define the term ‘precipitate’. An insoluble solid forms when two solutions are mixed. ...
MC84 - Southchemistry.com
... 0.10 mole of powdered silver is added to 10. milliliters of 6.0-molar nitric acid, the number of moles of NO gas that can be formed is (A) 0.015 mole (B) 0.020 mole (C) 0.030 mole (D) 0.045 mole (E) 0.090 mole 53. Which, if any, of the following species is in the greatest concentration in a 0.100-mo ...
... 0.10 mole of powdered silver is added to 10. milliliters of 6.0-molar nitric acid, the number of moles of NO gas that can be formed is (A) 0.015 mole (B) 0.020 mole (C) 0.030 mole (D) 0.045 mole (E) 0.090 mole 53. Which, if any, of the following species is in the greatest concentration in a 0.100-mo ...
UNITS OF CONCENTRATION
... takes into account the actual number of reacting species per mole of reagent (i.e., protons in the case of acid/base reactions or electrons in the case of redox reactions). For acids, an equivalent is defined as one mole of protons. The equivalent amount of any acid is the amount of acid that delive ...
... takes into account the actual number of reacting species per mole of reagent (i.e., protons in the case of acid/base reactions or electrons in the case of redox reactions). For acids, an equivalent is defined as one mole of protons. The equivalent amount of any acid is the amount of acid that delive ...
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.