First Semester Final Review
... The intial pressure of W(g) is 1.20 atm and that of X(g) is 1.60 atm. No Y(g) or Z(g) is initially present. The experiment is carried out at constant temperature. What is the partial pressure of Z(g) when the partial pressure of W(g) has decreased to 1.0 atm? a. 0.20 atm b. 0.40 atm c. 1.0 atm d. 1. ...
... The intial pressure of W(g) is 1.20 atm and that of X(g) is 1.60 atm. No Y(g) or Z(g) is initially present. The experiment is carried out at constant temperature. What is the partial pressure of Z(g) when the partial pressure of W(g) has decreased to 1.0 atm? a. 0.20 atm b. 0.40 atm c. 1.0 atm d. 1. ...
AP Chemistry Review Preparing for the AP
... Review your incorrect MC from the Practice Exam and understand the concepts. Know the 6 strong acids HCl, HI, HBr, H2SO4, HClO4, HNO3 and the one weak by formula acetic acid CH3COOH, everything else is weak. Remember that strong acids/bases don’t make buffers!!! You should be 100% confident what ion ...
... Review your incorrect MC from the Practice Exam and understand the concepts. Know the 6 strong acids HCl, HI, HBr, H2SO4, HClO4, HNO3 and the one weak by formula acetic acid CH3COOH, everything else is weak. Remember that strong acids/bases don’t make buffers!!! You should be 100% confident what ion ...
apch04 test review_ans
... In the spectroscopy lab, we used the calorimeter and measured transmittance to determine the concentration of blue dye in a solution. Our calorimeters have three options for wavelengths: Red - 620 nm, Green - 550 nm, Blue - 470 nm. Based on the absorption spectrum for the three dyes in the figure be ...
... In the spectroscopy lab, we used the calorimeter and measured transmittance to determine the concentration of blue dye in a solution. Our calorimeters have three options for wavelengths: Red - 620 nm, Green - 550 nm, Blue - 470 nm. Based on the absorption spectrum for the three dyes in the figure be ...
B - eko.olunet.org
... Purity Grade of Compounds 3. In chemical experiments, the purity of the starting material and the composition of impurities/additives are of great importance. For his experiments, Thomas needed KBr with at least 95.0% purity. In order to determine the purity of an available inorganic compound, he w ...
... Purity Grade of Compounds 3. In chemical experiments, the purity of the starting material and the composition of impurities/additives are of great importance. For his experiments, Thomas needed KBr with at least 95.0% purity. In order to determine the purity of an available inorganic compound, he w ...
17 - Wiley
... 14.43 The pH of an aqueous solution of a salt is determined by the acid–base characteristics of the cation and anion. Because Na+ has no acid–base tendencies, the anions in these compounds determine the pH of their solutions. Solution pH increases with the strength of the basic anion, which in turn ...
... 14.43 The pH of an aqueous solution of a salt is determined by the acid–base characteristics of the cation and anion. Because Na+ has no acid–base tendencies, the anions in these compounds determine the pH of their solutions. Solution pH increases with the strength of the basic anion, which in turn ...
Chemistry - Higher tier - Paper 4 - Sample assessment material
... A student heats 1.89 g of zinc nitrate until there is no further reaction. What is the total volume of gas, measured at room temperature and pressure, made in this reaction? Assume that one mole of gas occupies a volume of 24 dm3 at room temperature and ...
... A student heats 1.89 g of zinc nitrate until there is no further reaction. What is the total volume of gas, measured at room temperature and pressure, made in this reaction? Assume that one mole of gas occupies a volume of 24 dm3 at room temperature and ...
fahad h. ahmad - Fahad`s Academy
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
Equilibrium Notes - Chemistry Teaching Resources
... H + (aq) + OH – (aq) → H 2 O(l) As research continued throughout the nineteenth and early twentieth centuries, the definitions had to be refined. For example, pure hydrogen chloride is a gas that contains no H + ions and ammonia has no OH – ions but can neutralise an acid. It was also discovered tha ...
... H + (aq) + OH – (aq) → H 2 O(l) As research continued throughout the nineteenth and early twentieth centuries, the definitions had to be refined. For example, pure hydrogen chloride is a gas that contains no H + ions and ammonia has no OH – ions but can neutralise an acid. It was also discovered tha ...
2016 Chemistry Examination Paper
... Answer all parts of Questions 1 to 4 in the spaces provided in this question booklet. You may write on page 14 if you need more space to finish your answers. Question Booklet 2 (Questions 5 to 8) Answer all parts of Questions 5 to 8 in the spaces provided in Question Booklet 2. You may write on page ...
... Answer all parts of Questions 1 to 4 in the spaces provided in this question booklet. You may write on page 14 if you need more space to finish your answers. Question Booklet 2 (Questions 5 to 8) Answer all parts of Questions 5 to 8 in the spaces provided in Question Booklet 2. You may write on page ...
Review Final 111 Lect
... occupy the lattice points in each of the crystalline solids given below. b.Give one or two examples of an element or a compound that may exhibit each type of crystalline solids. Type of metallic crystal crystalline solid Kind of particles ...
... occupy the lattice points in each of the crystalline solids given below. b.Give one or two examples of an element or a compound that may exhibit each type of crystalline solids. Type of metallic crystal crystalline solid Kind of particles ...
OCR Gateway Science
... (b) Suggest why the first run was so much higher than the others. (c) Calculate the average titre using the results for titres 2 to 5. (d) Explain why you would not use universal indicator for this titration. (e) Phenolphthalein indicator was used to find the end point of the titration. Why is this ...
... (b) Suggest why the first run was so much higher than the others. (c) Calculate the average titre using the results for titres 2 to 5. (d) Explain why you would not use universal indicator for this titration. (e) Phenolphthalein indicator was used to find the end point of the titration. Why is this ...
Answer Key, Problem Set 6 – complete, with explanations
... ions, I have shown the ions as “touching” here—you could have shown them with a bit of space in between them as well, as long as the amount of space in between was roughly “equal” for all adjacent ions). To further ...
... ions, I have shown the ions as “touching” here—you could have shown them with a bit of space in between them as well, as long as the amount of space in between was roughly “equal” for all adjacent ions). To further ...
www.fahadsacademy.com
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
Types of Aqueous Reactions
... The key to the aqueous chemistry of acids and bases is WATER! (Huge surprise, I know! ) Water, among its many interesting properties, is also amphiprotic. Water is both an acid and a base! H2O – It has a proton and it has excess electrons on the oxygen. ...
... The key to the aqueous chemistry of acids and bases is WATER! (Huge surprise, I know! ) Water, among its many interesting properties, is also amphiprotic. Water is both an acid and a base! H2O – It has a proton and it has excess electrons on the oxygen. ...
Week 1 NEPHAR 201- Analytical Chemistry II_Introduction_5
... A solution of sodium chloride, NaCl (500 mL) contains 20.0 g of NaCl. What is the molar concentration of NaCl in this solution? Describe how this ...
... A solution of sodium chloride, NaCl (500 mL) contains 20.0 g of NaCl. What is the molar concentration of NaCl in this solution? Describe how this ...
CLASSES AND NOMENCLATURE OF INORGANIC COMPOUNDS
... D 16 times D increase of the pressure E 6 times E decrease of the temperature 9. Speed of what reactions increases if the 10. The law of mass action describes the temperature is increased? dependence of rate of chemical reaction on: A endothermic A the concentration of reactans B exothermic B areas ...
... D 16 times D increase of the pressure E 6 times E decrease of the temperature 9. Speed of what reactions increases if the 10. The law of mass action describes the temperature is increased? dependence of rate of chemical reaction on: A endothermic A the concentration of reactans B exothermic B areas ...
85 Q.2 Pure water has a low electricity conductivity because A. it
... 88 Q.10 What volume of water, when added to 25 cm3 of 2M hydrochloric acid, would give a 0.2M solution of the acid? A. 10 cm3 B. 100 cm3 C. 225 cm3 D. 250 cm3 88 Q.14 Consider the reaction: MnO4 - (aq) + 8H+(aq) + 5Fe2+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) Which of the following statements concernin ...
... 88 Q.10 What volume of water, when added to 25 cm3 of 2M hydrochloric acid, would give a 0.2M solution of the acid? A. 10 cm3 B. 100 cm3 C. 225 cm3 D. 250 cm3 88 Q.14 Consider the reaction: MnO4 - (aq) + 8H+(aq) + 5Fe2+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) Which of the following statements concernin ...
Acids, Bases and Salts
... According to chemistry, the term "salt" is used for ionic compounds that is composed of positively charged cations (usually metal or ammonium ions) and the negatively charged anions, so that the product remains neutral and without a net charge. The anions may be inorganic (Cl-) as well as organic (C ...
... According to chemistry, the term "salt" is used for ionic compounds that is composed of positively charged cations (usually metal or ammonium ions) and the negatively charged anions, so that the product remains neutral and without a net charge. The anions may be inorganic (Cl-) as well as organic (C ...
Chapter 4 Solution Chemistry
... Examples: Stoichiometry of Precipitation Rxns 7. The insolubility of some ionic compounds can be used to determine the concentration of ions in solution. For example, Ag+ can be added to a solution of Cl- to precipitate all of the Cl- in the form of insoluble AgCl. The concentration of the Cl- is de ...
... Examples: Stoichiometry of Precipitation Rxns 7. The insolubility of some ionic compounds can be used to determine the concentration of ions in solution. For example, Ag+ can be added to a solution of Cl- to precipitate all of the Cl- in the form of insoluble AgCl. The concentration of the Cl- is de ...
Discussion Questions
... HNO3 and 100.00 mL of 0.200 M HNO3. Calculate the molarity of the final solution of nitric acid. 20. A solution of ethanol (C2H5OH) in water is prepared by dissolving 75.0 mL of ethanol (density 5 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in thi ...
... HNO3 and 100.00 mL of 0.200 M HNO3. Calculate the molarity of the final solution of nitric acid. 20. A solution of ethanol (C2H5OH) in water is prepared by dissolving 75.0 mL of ethanol (density 5 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in thi ...
Chemistry I
... Cl + e → Cl Negative ions = anions. anions. Cations derived from metal name (sodium (cat)ion (cat)ion,, silver (cat)ion (cat)ion)) or have the suffix –ium (NH4+ = ammonium ion) Anions from nonnon-metal atoms have the suffix –ide (chloride) in compounds with oxygen –ate (SO42-=sulfate) or –ite (SO32- ...
... Cl + e → Cl Negative ions = anions. anions. Cations derived from metal name (sodium (cat)ion (cat)ion,, silver (cat)ion (cat)ion)) or have the suffix –ium (NH4+ = ammonium ion) Anions from nonnon-metal atoms have the suffix –ide (chloride) in compounds with oxygen –ate (SO42-=sulfate) or –ite (SO32- ...
DRAFT AP® CHEMISTRY 2005 SCORING GUIDELINES
... partially burned wood" in pure hydrogen! Those good students shouldn't think the experiment is done in an atmosphere of pure hydrogen or they are not that good! No mention of a balloon in my text, so where did that notion come from? "Burns" may be enough for the point without an explosion pop, thoug ...
... partially burned wood" in pure hydrogen! Those good students shouldn't think the experiment is done in an atmosphere of pure hydrogen or they are not that good! No mention of a balloon in my text, so where did that notion come from? "Burns" may be enough for the point without an explosion pop, thoug ...
введение в общую introductio to the general ch ведение в общую
... part of a substance that has the physical and chemical properties of that substance. Some elements exist in form of molecules. For example, hydrogen and oxygen exist as two-atom molecules. Sulfur may exist as an eight-atom molecule, S8, while phosphorus may exist as a four-atom molecule, P 4. Other ...
... part of a substance that has the physical and chemical properties of that substance. Some elements exist in form of molecules. For example, hydrogen and oxygen exist as two-atom molecules. Sulfur may exist as an eight-atom molecule, S8, while phosphorus may exist as a four-atom molecule, P 4. Other ...
Hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It functions as a base, a ligand, a nucleophile and a catalyst. The hydroxide ion forms salts, some of which dissociate in aqueous solution, liberating solvated hydroxide ions. Sodium hydroxide is a multi-million-ton per annum commodity chemical. A hydroxide attached to a strongly electropositive center may itself ionize, liberating a hydrogen cation (H+), making the parent compound an acid.The corresponding electrically neutral compound •HO is the hydroxyl radical. The corresponding covalently-bound group -OH of atoms is the hydroxyl group.Hydroxide ion and hydroxyl group are nucleophiles and can act as a catalyst in organic chemistry.Many inorganic substances which bear the word ""hydroxide"" in their names are not ionic compounds of the hydroxide ion, but covalent compounds which contain hydroxyl groups.