Untitled
... pH and pOH The [H3O+] of any aqueous solution is a very important characteristic, and we often need to talk about it. It is inconvenient to talk about the concentration in units such as 4.50 x 10-12 M or numbers similar to this form. So scientist defined a new number called _____ to talk about the c ...
... pH and pOH The [H3O+] of any aqueous solution is a very important characteristic, and we often need to talk about it. It is inconvenient to talk about the concentration in units such as 4.50 x 10-12 M or numbers similar to this form. So scientist defined a new number called _____ to talk about the c ...
PHYSICAL SETTING CHEMISTRY
... Graphite and diamond are two crystalline arrangements for carbon. The crystal structure of graphite is organized in layers. The bonds between carbon atoms within each layer of graphite are strong. The bonds between carbon atoms that connect different layers of graphite are weak because the shared el ...
... Graphite and diamond are two crystalline arrangements for carbon. The crystal structure of graphite is organized in layers. The bonds between carbon atoms within each layer of graphite are strong. The bonds between carbon atoms that connect different layers of graphite are weak because the shared el ...
Revision Y12 Chemistry PLC
... pairs (including lone pairs) surrounding the central atom as predicted by electron pair repulsion, including the relative repulsive strengths of bonded pairs and lone pairs of electrons (h) electron pair repulsion to explain the following shapes of molecules and ions: linear, non-linear, trigonal pl ...
... pairs (including lone pairs) surrounding the central atom as predicted by electron pair repulsion, including the relative repulsive strengths of bonded pairs and lone pairs of electrons (h) electron pair repulsion to explain the following shapes of molecules and ions: linear, non-linear, trigonal pl ...
Classifying Chemical Reactions by What Atoms Do
... H2SO4(aq) + Sr(OH)2(aq) ➜ H2SO4(aq) + Sr(OH)2(aq) ➜ SrSO4(s) + 2 H2O(l) 2H+ (aq) + SO42-(aq) + Sr2+ (aq) + 2OH-(aq) ➜ SrSO4 (s) + 2H2O(l) ...
... H2SO4(aq) + Sr(OH)2(aq) ➜ H2SO4(aq) + Sr(OH)2(aq) ➜ SrSO4(s) + 2 H2O(l) 2H+ (aq) + SO42-(aq) + Sr2+ (aq) + 2OH-(aq) ➜ SrSO4 (s) + 2H2O(l) ...
AP Chemistry Note Outline
... 6. Cancel out any extra water and OH7. Balance Charge with e8. Multiply reactions by factors such that the e- cancel Add both ½ reactions ...
... 6. Cancel out any extra water and OH7. Balance Charge with e8. Multiply reactions by factors such that the e- cancel Add both ½ reactions ...
Equilibrium - District 196
... ***The only stressor that can affect these concentration ratios is temperature ***Keq is temperature dependant ...
... ***The only stressor that can affect these concentration ratios is temperature ***Keq is temperature dependant ...
Order and Half-life Equations
... You will be given a table of data showing changes in concentration with time. The order (and thus the rate law) is determined by linear regression analysis of three graphs. The graph with the best straight line (r2 closest to 1) determines the order. Note that the absolute value of the slope is the ...
... You will be given a table of data showing changes in concentration with time. The order (and thus the rate law) is determined by linear regression analysis of three graphs. The graph with the best straight line (r2 closest to 1) determines the order. Note that the absolute value of the slope is the ...
Wizard Test Maker
... 66. What is the minimum number of kiloJoules needed to change 40.0 grams of water at 100ºC to steam at the same temperature and pressure? ...
... 66. What is the minimum number of kiloJoules needed to change 40.0 grams of water at 100ºC to steam at the same temperature and pressure? ...
Lecture 12
... 2. Photosynthesis is endothermic. This means it requires energy from an outside source. In this case the energy source is the sun. Essentially plants convert the photo energy from the sun into high energy C - C bonds. This conversion happens in the plants photosystems. Respiration is exothermic. Thi ...
... 2. Photosynthesis is endothermic. This means it requires energy from an outside source. In this case the energy source is the sun. Essentially plants convert the photo energy from the sun into high energy C - C bonds. This conversion happens in the plants photosystems. Respiration is exothermic. Thi ...
153KB PDF - Clydeview Academy
... The questions may be answered in any order but all answers are to be written in the spaces provided in this answer book, and must be written clearly and legibly in ink. ...
... The questions may be answered in any order but all answers are to be written in the spaces provided in this answer book, and must be written clearly and legibly in ink. ...
document
... Calculate the number of moles of oxygen required to react exactly with 4.3 moles of propane, C3H8, in the above reaction 4.3 moles of C3H8 requires how many moles of O2 There is a 1:5 ratio So 4.3(1) : 4.3(5) ...
... Calculate the number of moles of oxygen required to react exactly with 4.3 moles of propane, C3H8, in the above reaction 4.3 moles of C3H8 requires how many moles of O2 There is a 1:5 ratio So 4.3(1) : 4.3(5) ...
Hess`s Law 5-1
... For a chemical equation that can be written as the sum of two or more steps the enthalpy change for the overall equation equals the sum of the enthalpy changes of the individual steps ...
... For a chemical equation that can be written as the sum of two or more steps the enthalpy change for the overall equation equals the sum of the enthalpy changes of the individual steps ...
EXPERIMENT 6
... given chemical compound. A chemical compound is composed of atoms of two or more elements chemically combined in definite proportions. For example, H2O and CO are compounds whereas H2 is a diatomic element. The atoms in a compound are held together by chemical bonds. The chemical formula helps ident ...
... given chemical compound. A chemical compound is composed of atoms of two or more elements chemically combined in definite proportions. For example, H2O and CO are compounds whereas H2 is a diatomic element. The atoms in a compound are held together by chemical bonds. The chemical formula helps ident ...
oxidation and reduction
... d) Titanium dissolves in concentrated hydrochloric acid to give titanium(III) chloride and hydrogen. Construct an ionic equation for this reaction by writing down two ionic half-equations and then combining them. ...
... d) Titanium dissolves in concentrated hydrochloric acid to give titanium(III) chloride and hydrogen. Construct an ionic equation for this reaction by writing down two ionic half-equations and then combining them. ...
model paper-1 - WordPress.com
... Alkane ‘A’ contains three C-C, eight C-H ϭ bonds and one C-C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 amu. Write IUPAC name of ‘A’. c) How will you convert benzene into acetophenone? d) State Markovnikov’s rule. e) What are the necessary conditions for any system to ...
... Alkane ‘A’ contains three C-C, eight C-H ϭ bonds and one C-C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 amu. Write IUPAC name of ‘A’. c) How will you convert benzene into acetophenone? d) State Markovnikov’s rule. e) What are the necessary conditions for any system to ...
CH 4: Chemical Reactions
... (a) NaOH(aq) + CH3CO2H(aq) (b) HCl(aq) + NH3(aq) • NaOH strong base will dissociate well • CH3CO2H weak acid doesn’t dissociate well • HCl is a strong acid and therefore a strong electrolyte • NH3 is a weak base and is a weak electrolyte ...
... (a) NaOH(aq) + CH3CO2H(aq) (b) HCl(aq) + NH3(aq) • NaOH strong base will dissociate well • CH3CO2H weak acid doesn’t dissociate well • HCl is a strong acid and therefore a strong electrolyte • NH3 is a weak base and is a weak electrolyte ...
Determining Chemical Formulas
... temperature contain equal numbers of molecules Leads to definition of the “mole” Mole Def: the number equal to the number of atoms in 12.01 grams of carbon ...
... temperature contain equal numbers of molecules Leads to definition of the “mole” Mole Def: the number equal to the number of atoms in 12.01 grams of carbon ...
Stoichiometry Objectives
... -we round Avogadro’s number to three significant figures— 6.02 x 1023. - If you write out Avogadro’s number, it looks like this: ...
... -we round Avogadro’s number to three significant figures— 6.02 x 1023. - If you write out Avogadro’s number, it looks like this: ...
Stoichiometry
Stoichiometry /ˌstɔɪkiˈɒmɨtri/ is the calculation of relative quantities of reactants and products in chemical reactions.Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated.As seen in the image to the right, where the balanced equation is:CH4 + 2 O2 → CO2 + 2 H2O.Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures these quantitative relationships, and is used to determine the amount of products/reactants that are produced/needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry. In the example above, reaction stoichiometry measures the relationship between the methane and oxygen as they react to form carbon dioxide and water.Because of the well known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine quantities by weight in a reaction described by a balanced equation. This is called composition stoichiometry.Gas stoichiometry deals with reactions involving gases, where the gases are at a known temperature, pressure, and volume and can be assumed to be ideal gases. For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products. In practice, due to the existence of isotopes, molar masses are used instead when calculating the mass ratio.