SAMPLE PAPER -4 Time Allowed: 3 Hrs
... Describe the principle involved in each of the following processes of metallurgy : (i) Froth floatation method (ii) Electrolytic refining of metals (iii) Zone refining of metals Q22 Give reasons for the following: a) H3PO3 is diprotic(dibasic). b) The electron gain enthalpy with negative sign for fl ...
... Describe the principle involved in each of the following processes of metallurgy : (i) Froth floatation method (ii) Electrolytic refining of metals (iii) Zone refining of metals Q22 Give reasons for the following: a) H3PO3 is diprotic(dibasic). b) The electron gain enthalpy with negative sign for fl ...
Chapter 7 - Chemical Reactions
... How much heat is absorbed by a 200 gram piece of granite as energy from the sun causes its temperature to change from 20°C to 50°C? The specific heat of granite is 0.803 J/g °C. Given the equation 3CO(g) + Fe2O3(s) 2Fe(s) + 3CO2(g) + 24.7 kJ, how much heat is released when 3.0 mol of Fe2O3 react? ...
... How much heat is absorbed by a 200 gram piece of granite as energy from the sun causes its temperature to change from 20°C to 50°C? The specific heat of granite is 0.803 J/g °C. Given the equation 3CO(g) + Fe2O3(s) 2Fe(s) + 3CO2(g) + 24.7 kJ, how much heat is released when 3.0 mol of Fe2O3 react? ...
Solving equations on the TI89
... The TI89 doesn’t require that your equation be written with a zero on the right-hand side. For example, we could have based our solution on a direct combination of equations (9.10) and (9.11): eqn:s=1.14e-3/e^(-4.039*s^(1/2)) 3. Press ENTER . You should see a line that says s=. There may be a number ...
... The TI89 doesn’t require that your equation be written with a zero on the right-hand side. For example, we could have based our solution on a direct combination of equations (9.10) and (9.11): eqn:s=1.14e-3/e^(-4.039*s^(1/2)) 3. Press ENTER . You should see a line that says s=. There may be a number ...
Oxidation Number Rules
... 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is -1 in all fluorine containing compounds. b. In most oxygen containing compounds oxygen is -2. In peroxides (i.e. H2O2) each oxygen has an oxidation number of -1. In the compound OF2, the oxygen atom ...
... 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is -1 in all fluorine containing compounds. b. In most oxygen containing compounds oxygen is -2. In peroxides (i.e. H2O2) each oxygen has an oxidation number of -1. In the compound OF2, the oxygen atom ...
Ch. 3 - Chemical Reactions
... two molecules of aqueous hydrochloric acid to produce one unit of aqueous zinc chloride and one molecule of hydrogen gas. ...
... two molecules of aqueous hydrochloric acid to produce one unit of aqueous zinc chloride and one molecule of hydrogen gas. ...
Knox Chem Prelim 2009
... Industrially, the main reaction used to produce hydrogen gas is by heating steam ...
... Industrially, the main reaction used to produce hydrogen gas is by heating steam ...
CHEM 20 FINAL EXAM: STUDY HEADINGS Jan 2012
... use prefixes to identify substituted groups; alkyl groups, halogens, and a few others saturated and unsaturated hydrocarbons: general formulas for the main groups; identify, name and draw structural formulas for aromatic compounds: benzene and its derivatives identify selected functional groups by s ...
... use prefixes to identify substituted groups; alkyl groups, halogens, and a few others saturated and unsaturated hydrocarbons: general formulas for the main groups; identify, name and draw structural formulas for aromatic compounds: benzene and its derivatives identify selected functional groups by s ...
Non-Metals
... It will also combine with hydrogen under certain conditions of temperature and pressure to form ammonia . ...
... It will also combine with hydrogen under certain conditions of temperature and pressure to form ammonia . ...
What is the pH of a 0.100 M
... What happens if more H+ is added to water? What happens if more OH- is added to water? The equilibrium of water, H3O+ and OH- means if we know either the concentration of H3O+ or the concentration of OH- in an aqueous solution, then we know the concentration of the other. Example: What is the pH of ...
... What happens if more H+ is added to water? What happens if more OH- is added to water? The equilibrium of water, H3O+ and OH- means if we know either the concentration of H3O+ or the concentration of OH- in an aqueous solution, then we know the concentration of the other. Example: What is the pH of ...
Ionization methods - 2-CI - Florida International University
... Generally ions with an even number of electrons (cations, RH+) are more stable than ions with an odd number of electrons (radical cations) like A+· primary ions. ...
... Generally ions with an even number of electrons (cations, RH+) are more stable than ions with an odd number of electrons (radical cations) like A+· primary ions. ...
AP Chemistry Test Review
... 34) Calculate K by doing ICE box problems 35) acid/base definitions…Bronsted-Lowry = acids donate protons; Lewis= acids accept e- pair 36) calculate pH, pOH, [H+], [OH−] 37) acid equilibrium problems…ICE box…remember pH can be used to find [H+]. 38) salt pH…example: Na2CO3 = slightly basic; Al(NO3)3 ...
... 34) Calculate K by doing ICE box problems 35) acid/base definitions…Bronsted-Lowry = acids donate protons; Lewis= acids accept e- pair 36) calculate pH, pOH, [H+], [OH−] 37) acid equilibrium problems…ICE box…remember pH can be used to find [H+]. 38) salt pH…example: Na2CO3 = slightly basic; Al(NO3)3 ...
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.