NH4Cl #2 no one ammonium chloride CaCO3 #3 Joseph Johnson calcium carbonate C6H12O6 #4 Scott Skelton glucose #5 cornstarch Scott Skelton Write the balanced chemical equation representing the positive NaOH test for magnesium sulfate. (2 pts) MgSO4(aq) + 2NaOH(aq) Na2SO4(aq) + Mg(OH)2(s) Write the balanced chemical equation representing the positive HCl test for sodium bicarbonate. (2 pts) NaHCO3(s) + HCl(aq) CO2(g) + H2O(l) + NaCl(aq) Write the chemical formula for the gas that is liberated when ammonium chloride reacts with sodium hydroxide. (1 pt.) NH4Cl(aq) + NaOH(aq) NH3(g) + NaCl(aq) + H2O(l) Part 2: Polymers (21 points) Identify samples #6-#8 below. #6 used to make water bottles, 2-liter soda bottles, cooking oil bottles – #7 used in drinking cups positive acetone test – – #8 used in construction, commonly pipes positive copper wire test – – Identification Who does this implicate? Plastic full name OR abbreviation (if anyone) (2 pts each) (1 pt each)
#2 NH4Cl ammonium chloride no one #3 CaCO3 calcium carbonate Joseph Johnson #4 C6H12O6 glucose Scott Skelton #5 cornstarch Scott Skelton Write the balanced chemical equation representing the positive NaOH test for magnesium sulfate. (2 pts) MgSO4(aq) + 2NaOH(aq) Na2SO4(aq) + Mg(OH)2(s) Write the balanced chemical equation representing the positive HCl test for sodium bicarbonate. (2 pts) NaHCO3(s) + HCl(aq) CO2(g) + H2O(l) + NaCl(aq) Write the chemical formula for the gas that is liberated when ammonium chloride reacts with sodium hydroxide. (1 pt.) NH4Cl(aq) + NaOH(aq) NH3(g) + NaCl(aq) + H2O(l) Part 2: Polymers (21 points) Identify samples #6-#8 below. #6 – used to make water bottles, 2-liter soda bottles, cooking oil bottles #7 – used in drinking cups – positive acetone test #8 – used in construction, commonly pipes – positive copper wire test Plastic Identification full name OR abbreviation (2 pts each) Who does this implicate? (if anyone) (1 pt each)
forensics_2017_c_fayettevillemanlius_key.docx