Reference Таblеs Scavenger Hunt

Reference Tables Scavenger Hunt Directions: Using the Reference Tables for Chemistry, locate the following information. Name C5H12. Pentane Write the equation for the decay of Kr-85. 36Kr → 37Rb + -10e Explain how you know that Na3PO4 is soluble in water but NiCrO4 is not. Na3PO4 is soluble because all phosphates are soluble. NiCrO4 is not soluble because most chromates are insoluble, except with Na⁺, K⁺, or NH₄⁺. Define STP and give its values including units. Standard Temperature and Pressure: T = 273 K, P = 101.3 kPa, 1 atm Name NaOH. Sodium Hydroxide Name C₂H₃O₂ or CH3COO. Acetate What is the solubility of sulfur dioxide at 40°C, in grams? 10 g SO2 in 100 g H2O What is the freezing point of fluorine? -219.6°C or 53 K What is the symbol for the mole? mol What is the unit for the heat of fusion and what do they mean? J/g or kJ/mol; It means the amount of heat needed to melt 1 gram of a substance. What is the vapor pressure of water at 75°C? 38 kPa How much heat does it take to convert 20g of water to steam at 100°C? Show work. q = mHv; q = 20 g x 2260 J/g = 45200 J What is the prefix for 1/1000 of a meter? milli What is the molecular formula of ammonia? NH3 What is the formula for the permanganate ion? MnO4- Name CH3COOH. Ethanoic acid (acetic acid) Write the symbol for a positron. 0e What is the half-life of Pu-239? 2.41 x 10^4 years Is the formation of water from its elements endothermic or exothermic? Exothermic What is the atomic mass of silver? 107.868 amu How much heat is released when LiBr dissolves in water? ΔH = -48.83 kJ Give the names and formulas of the strongest and weakest acids. Strongest: HCl (hydrochloric acid), Weakest: HF (hydrofluoric acid) What is the general formula for alkynes? What does it mean? CnH2n-2; It means that alkynes have triple bonds (C≡C) in their structure. 24. What is the electronegativity of chlorine and what does it mean? 3.2. This is chlorine's attraction for e-. 25. What is the decay mode of Au-198? β - Beta decay 26. What is the ionization energy of Rb and what does it mean? 403 kJ/mol - energy required to remove e- 27. Which atom is more likely to lose electrons, Al or Zn? Al - Higher - more easily oxidized 28. What is the atomic number of Te? Per Table - 52 29. What is the atomic radius of bromine? 117 pm 30. What are the oxidation states of sulfur? Per Table -2, +4, +6 31. Which indicator would be the best to use to identify a strong base?   Thymol Blue or Phenolphthalein 32. Write the electron configuration of potassium. Per Table - 2-8-8-1 33. At what temperature will water boil, when the atmospheric pressure is 55 kPa? 85°C 34. What is the trend of atomic radii across period 3? Na-160, Mg-140, Al-124 Rad DEC - due to greater nuclear charge. 35. Will Mn produce colored ions in solution? Why or why not? Yes, it is a transition metal 36. Will Sn gain or lose electrons when it reacts with Cu? Sn-lose e- (OXID) because it is above Cu on the activity series. 37. What is the heat of vaporization of water? 2260 J/g 38. Will Al react with HCl to produce hydrogen gas? Yes - metals above H on the activity series react with acids to produce Hydrogen gas 39. What is the density of tin? 7.287 g/cm³ 40. In the molecule CCl4, what is the electronegativity difference of the C-Cl bond? Is the bond polar or nonpolar? Why? Is the molecule polar or nonpolar? Why?   0.5 - Polar bond - CCl4 is a NONPOLAR Molecule Using table T, solve the following problems. Show all work. 41. Give the parts per million of solute for a solution containing 25.0 g of sodium chloride in 200. g of water. ppm = g solute x 1,000,000 / g solution = 25.0 g x 1,000,000 / 200. g = 125,000 ppm 42. If the accepted value for the mass of an object is 10.3 g and a student found that the mass was 10.1 g, what is the student's percent error? %E = |mea. val - acc. val| / acc. val x 100 = |10.1 - 10.3| / 10.3 x 100 = 1.94% 43. If a peanut is burned in a calorimeter containing 50.0 g of water and the water temperature changes from 45.0°C to 57.0°C, how many joules of energy were released by the peanut? q = mCΔT = 50.0 g x 4.18 J/g°C x 12°C = 2500 J