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Chemistry – Midterm Part 2 Material Unit Review packet 2014-2015 Resources A 1. Label the following as chemical or physical change: Grass growing___________ Evaporating water______ Dissolving sugar in water_______ Na in water appears to dissolve and forms NaOH____ 2. An element is found which is a good conductor of electricity, is ductile, brittle and does not react with acid. Is this new element a metal, nonmetal or metalloid? 3. The current periodic table is arranged according to increasing______. 4. Elements in the same vertical column are in the same________________ and have similar properties due to similar_____________________. 5. An element is discovered which bonds to oxygen in a 1:1 ratio. Where would it be placed on the periodic table? ________________ 6. Estimate the boiling point of Kr if the boiling point of argon is -186°C and xenon -112°C. 7. Give the characteristics of each group and label the periodic table with their correct positions: Alkali metals Halogens Groups or families alkali earth metals transitional metals noble gases Periods lanthanide and actinide metals Resources B 1. Using the following Reaction, identify the terms and answer the following questions: Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g) Identify: Products Subscript reactants coefficient element compound chemical symbol chemical formula List the phase of matter for each reactant and product: How many H atoms are in the reactants, the products? How would you obtain, purify each product formed by this reaction. In other words, how would you separate the products so you have each alone? 2. How does the Law of Conservation of Matter relate to chemical equations? 3. Balance the following chemical reactions: H2O + NO NH3 + O2 AgNO3 + BaCl2 Ba(NO3)2 + AgCl Use the Metal Reactivity Series for questions 4 and 5: 4. Is silver the best metal for the statue of liberty? Justify your answer: 5. Predict whether the following reactions will occur: 6. CuNO3 + Al NaNO3 + Zn --> Name the layers of the Earth. Which layer provides most of the resources people use? 7. Is it more important to recycle renewable or nonrenewable resources? Why? 8. Identify which of the following reactions is a redox reaction. In each redox reaction, identify: Substance being oxidized Reducing agent 2NaNO3 + BaI2 Zn + 2AgNO3 9. substance being reduced oxidizing agent label charges on each element in the redox reaction Ba(NO3)2 + 2NaI Zn(NO3)2 + 2Ag Which ions in problem 8 are polyatomic ions?