Chemistry Review - Hicksville Public Schools
... 2. An electrolyte is a substance which, when dissolved in water, forms a solution capable of conducting electricity. The ability to conduct electricity depends on the concentration of ions. 3. Arrhenius acids yield H+(aq) ions as the only positive ion in solution. H+(aq) ions may also be written a ...
... 2. An electrolyte is a substance which, when dissolved in water, forms a solution capable of conducting electricity. The ability to conduct electricity depends on the concentration of ions. 3. Arrhenius acids yield H+(aq) ions as the only positive ion in solution. H+(aq) ions may also be written a ...
Spring 2001 Key
... -----------------------------------------------------------------------------------------------------------(d) is a false statement: production of 6 moles of CO2 will produce 4440 kJ of heat. The reaction is exothermic. Energy would be required if the reaction was endothermic. (a) is true since for ...
... -----------------------------------------------------------------------------------------------------------(d) is a false statement: production of 6 moles of CO2 will produce 4440 kJ of heat. The reaction is exothermic. Energy would be required if the reaction was endothermic. (a) is true since for ...
Semester 1 Final Exam
... 43. List the following solutions prepared with the same solute in order of increasing concentration: I. 30.0 g solute in a 240 mL solution II. 30.0 g solute in a 120 mL solution III. 60.0 g solute in a 120 mL solution (A) I < II < III (B) II < I < III (C) II < III
... 43. List the following solutions prepared with the same solute in order of increasing concentration: I. 30.0 g solute in a 240 mL solution II. 30.0 g solute in a 120 mL solution III. 60.0 g solute in a 120 mL solution (A) I < II < III (B) II < I < III (C) II < III
CHAPTER-7 The p-Block Elements Block
... Boron trifluoride is prepared by heating B2O3 with CaF2 and conc. H2SO4 B2O3 + 3CaF2 + 3H2SO4 → 2BF3 + 3CaSO4 + 3H2O Hydrolysis of boron trihalides. Boron trihalides fumes in moist air and are highly sensitive to moisture. Boron trifluoride undergoes slow and partial hydrolysis with water while ...
... Boron trifluoride is prepared by heating B2O3 with CaF2 and conc. H2SO4 B2O3 + 3CaF2 + 3H2SO4 → 2BF3 + 3CaSO4 + 3H2O Hydrolysis of boron trihalides. Boron trihalides fumes in moist air and are highly sensitive to moisture. Boron trifluoride undergoes slow and partial hydrolysis with water while ...
國立嘉義大學九十二學年度
... 1.Which pair of elements would be most likely to form an ionic compound? (A) P and Br (B) Cu and K (C) C and O (D) O and Zn (E) Al and Rb 2.According to the solubility rules which one of the following compounds is insoluble in water? (A) NaCl (B) MgBr2 (C) FeCl2 ...
... 1.Which pair of elements would be most likely to form an ionic compound? (A) P and Br (B) Cu and K (C) C and O (D) O and Zn (E) Al and Rb 2.According to the solubility rules which one of the following compounds is insoluble in water? (A) NaCl (B) MgBr2 (C) FeCl2 ...
SCH3U - Norbraten
... Potassium metal and chlorine gas combine to form crystalline potassium chloride. Aluminum metal and hydrochloric acid reacts to form aqueous aluminum chloride and hydrogen gas. Solutions of calcium hydroxide and phosphoric acid react to form dissolved calcium phosphate and water. Copper metal and su ...
... Potassium metal and chlorine gas combine to form crystalline potassium chloride. Aluminum metal and hydrochloric acid reacts to form aqueous aluminum chloride and hydrogen gas. Solutions of calcium hydroxide and phosphoric acid react to form dissolved calcium phosphate and water. Copper metal and su ...
Chemical Equations
... • Ionic equations are equations that show only the species that are formed or changed in a reaction • Any ions that remain unchanged in a reaction are included in an ionic equation. • Ions that are present in a reaction but do not react are called spectator ions. ...
... • Ionic equations are equations that show only the species that are formed or changed in a reaction • Any ions that remain unchanged in a reaction are included in an ionic equation. • Ions that are present in a reaction but do not react are called spectator ions. ...
2015 Unit1 Part3.2 Equilibrium2
... The shorthand H+(aq) is always used in stoichiometric and equilibrium equations, although this is not strictly accurate. In 1923 the new discoveries led two chemists, Brønsted and Lowry, to define acids and bases in a different way: An acid is any substance capable of donating a proton. A base ...
... The shorthand H+(aq) is always used in stoichiometric and equilibrium equations, although this is not strictly accurate. In 1923 the new discoveries led two chemists, Brønsted and Lowry, to define acids and bases in a different way: An acid is any substance capable of donating a proton. A base ...
CHEMISTRY OF MAIN GROUP ELEMENTS Classification -1 s
... (1) Lithium reacts with N2 to form nitrides like Mg 6Li + N2 → 2Li3N / 3Mg + N2 → Mg3N2 (2) Li2CO3, LiOH , LiNO3 decompose to give Li2O. Other members of the group are stable. 2LiOH on heating ∆→ Li2O + H2O (3) Li2CO3, LiOH, LiF are much less soluble in water than the corresponding Na or K compounds ...
... (1) Lithium reacts with N2 to form nitrides like Mg 6Li + N2 → 2Li3N / 3Mg + N2 → Mg3N2 (2) Li2CO3, LiOH , LiNO3 decompose to give Li2O. Other members of the group are stable. 2LiOH on heating ∆→ Li2O + H2O (3) Li2CO3, LiOH, LiF are much less soluble in water than the corresponding Na or K compounds ...
Unit 5 • What Do Atoms Look Like
... great examples of a Brønsted-Lowry acid and base. Arrhenius only dealt with aqueous solutions. When NH3 and HCl meet in the air, a proton (H+) is transferred from the HCl to the NH3. The two resulting ions immediately are attracted to each other to form the solid, NH4Cl(s) which we see as smoke. HCl ...
... great examples of a Brønsted-Lowry acid and base. Arrhenius only dealt with aqueous solutions. When NH3 and HCl meet in the air, a proton (H+) is transferred from the HCl to the NH3. The two resulting ions immediately are attracted to each other to form the solid, NH4Cl(s) which we see as smoke. HCl ...
Section 1 Sulfuric Acid, 50% v/v (1:1) Product
... Physical and Chemical Properties W Personal protection X ...
... Physical and Chemical Properties W Personal protection X ...
For H 2 O
... we have by using the above prefixes. If we only have one of the first element listed, we do not need to state that by using the prefix mono-. However, we do need to state any other quantity of the elements. ...
... we have by using the above prefixes. If we only have one of the first element listed, we do not need to state that by using the prefix mono-. However, we do need to state any other quantity of the elements. ...
A.P. Chemistry Writing Chemical Reactions Generally students do
... These molecular equations can be converted into net-ionic form by considering the information given in the previous handout regarding the strengths of acids and bases as well as the solubility of salts. Strong electrolytes of any type exist in water solution as separated ions. Weak electrolytes exis ...
... These molecular equations can be converted into net-ionic form by considering the information given in the previous handout regarding the strengths of acids and bases as well as the solubility of salts. Strong electrolytes of any type exist in water solution as separated ions. Weak electrolytes exis ...
Section B - 8 UNO NON-WASTE CHEMICAL STORAGE
... Examples: hydrochloric acid, hydrofluoric acid, phosphoric acid b. Organic Acids (AC-O) Examples: acetic acid (non-glacial), formic acid, benzoic acid 6. Bases ...
... Examples: hydrochloric acid, hydrofluoric acid, phosphoric acid b. Organic Acids (AC-O) Examples: acetic acid (non-glacial), formic acid, benzoic acid 6. Bases ...
Thermodynamics and kinetics
... • At equilibrium, no further change as long as external conditions are constant • Change in external conditions can change equilibrium A stressed system at equilibrium will shift to reduce stress concentration, pressure, temperature • N2 + 3 H2 <--> 2 NH3 + 22 kcal What is the shift due to Inc ...
... • At equilibrium, no further change as long as external conditions are constant • Change in external conditions can change equilibrium A stressed system at equilibrium will shift to reduce stress concentration, pressure, temperature • N2 + 3 H2 <--> 2 NH3 + 22 kcal What is the shift due to Inc ...
physical chemistry notes
... stoichiometry of their reactions, we mean that one mole of a weak acid (such as ethanoic acid) reacts in the same molar ratio as one mole of a strong acid (such as hydrochloric acid) when reacting with alkalis, metal oxides, metal carbonates or metals such as magnesium. The molar ratio will be the s ...
... stoichiometry of their reactions, we mean that one mole of a weak acid (such as ethanoic acid) reacts in the same molar ratio as one mole of a strong acid (such as hydrochloric acid) when reacting with alkalis, metal oxides, metal carbonates or metals such as magnesium. The molar ratio will be the s ...
Acid
An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. Aqueous solutions of acids have a pH of less than 7. Non-aqueous acids are usually formed when an anion (negative ion) reacts with one or more positively charged hydrogen cations. A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.Common examples of acids include hydrochloric acid (a solution of hydrogen chloride which is found in gastric acid in the stomach and activates digestive enzymes), acetic acid (vinegar is a dilute solution of this liquid), sulfuric acid (used in car batteries), and tartaric acid (a solid used in baking). As these examples show, acids can be solutions or pure substances, and can be derived from solids, liquids, or gases. Strong acids and some concentrated weak acids are corrosive, but there are exceptions such as carboranes and boric acid.