Chem 131- Mid-term Exam Spring 2020 Worksheet ST

Name: Date: Chem. 131-05 Mid-term Worksheet (Chapters 1, 2, 3, 4 and 5) Write the ionic formula for the compounds formed by the following ions: a. Iron (II) ions and Oxide ions b. Cr+3 and S-2 ions c. Ni+2 and NO3- ions d. NH4+ and O-2 ions e. Ag+ and P-3 ions Write the name for the following ionic compounds: Ca(OH)2 FeF3 CuI Cu(CN)2 FeSO3 Write the formula for the following compounds. Tetraphosphorous trioxide Magnesium Sulfite Cadmium Carbonate Dihydrogen monoxide Calcium sulfate tetrahydrate Naming the following covalent compounds: SCl2 BrF5 P2O OI2 P2O5 How many silver atoms are contained in 3.75 moles of silver? How many moles are in 2.16 x 1024 atoms of lead? A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore? How many iron atoms are contained in 354 g of iron? What mass (in kg) does 5.84 moles of titanium (Ti) have? Give the number of neutrons in P-3. How many electrons are in the ion, Cu2+? Write an equation for the following reactions and balance: Calcium and Nitrogen gas reacts to form Calcium Nitride. Iron and oxygen gas reacts to form Iron (III) Oxide. Lithium and water reacts to form lithium hydroxide and hydrogen gas. Four atoms of aluminum and six atoms of sulfur react to form two formula units of aluminum sulfide. One molecule of hydrogen plus one molecule of chlorine reacts to form two molecules of hydrogen chloride. Calculate the number of moles in 450 g of C4H8O2 Calculate the number of moles in 2.58 x 1026 molecules of C8H9O2N (Tylenol) Calculate the mass percentage of each component in lead (II) Nitrite. Determine the molarity of a solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution. Determine the molarity of a solution formed by dissolving 468 mg of MgI2 in enough water to yield 50.0 mL of solution. How many milliliters of a 0.184 M KNO3 solution contain 0.113 moles of KNO3? How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution? How many molecules of sucrose (C12H22O11, molar mass = 342.30 g/mol) are contained in 14.3 mL of 0.140 M sucrose solution? Give the complete ionic equation and net ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed. The titration of 80.0 mL of an unknown concentration H3PO4 solution requires 126 mL of 0.218 M KOH solution. What is the concentration of the H3PO4 solution (in M)? What volume (in mL) of 0.0887 M MgCl2 solution is needed to make 275.0 mL of 0.0224 M MgCl2 solution? Determine the concentration of a solution prepared by diluting 20.0 mL of a 0.200 M LiCl to 250.0 mL. How many grams of NaCl are required to make 250.00 mL of a 3.000 M solution? What volume of a 0.540 M NaOH solution contains 12.5 g of NaOH? What is the concentration of HCl in the final solution when 65 mL of a 9.0 M HCl solution is diluted with pure water to a total volume of 0.15 L? How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.25 L of a 3.5 M solution? List the following compounds as soluble or insoluble, in water? A) Na2SO4 B) KNO3 C) Ba SO4 D) Rb2CO3 List the following compounds as soluble or insoluble, in water? A) Cu3(PO4)2 B) FeS C) Cu(NO3)2 D) SrCO3 What will the following pairs of aqueous solutions form, when mixed? A) CsI(aq) + NaOH(aq) B) HCl(aq) + Ca(OH)2(aq) C) Na2SO4(aq) + Ba (NO3)2(aq) D) KNO3(aq) + NH4F(aq) What will the following pairs of aqueous solutions form, when mixed? A) Mg(NO3)2(aq) + K2CO3(aq) B) Na2SO4(aq) + Cu(NO3)2(aq) C) LiClO4(aq) + (NH4)2S(aq) D) NH4Cl(aq) + NH4I(aq) What will the following pairs of aqueous solutions form, when mixed? A) Zn(s) + 2 AgNO3(aq) ? B) KCl(aq) + LiI(aq) ? C) 2 NaI(aq) + Hg2(NO3)2(aq) ? D) HCl(aq) + KOH(aq) ? Complete the following reactions: CH4(g) + 2 O2(g) ? H2SO4(aq) + 2 LiOH(aq) ? Mg(s) + Cu(NO3)2(aq) ? HCl(aq) + (NH4)2S(aq) ? NaCl(aq) + AgNO3(aq) ?