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- We prepare a solution by mixing 0.10 L of 0.12 M sodium chloride with 0.23 L of a 0.18 M MgCl2 solution. What volume of a 0.20 M silver nitrate solution is needed to precipitate all the Cl- ions in the solution as AgCl?
문제 9
문제 21a
Calculate the molarity of each solution. a. 1.22 mol of KI in 1.15 L solution
문제 21c
Calculate the molarity of each solution. c. 132.4 mg NaCl in 255.4 mL of solution
문제 23
What is the molarity of NO3– in each solution? a. 0.150 M KNO3 b. 0.150 M Ca(NO3)2 c. 0.150 M Al(NO3)3
문제 25
What is the molarity of NO3– in each solution? a. 0.225 M NaNO3 b. 0.225 M Mg(NO3)2 c. 0.225 M Al(NO3)3
문제 26a
what is the molarity of Br- in each solution? a. 0.100 M KBr
문제 26b
What is the molarity of Br- in each solution? b. 0.150 M CaBr2
문제 26c
What is the molarity of Br- in each solution? 0.200 m AlBr3
문제 27a
How many moles of KCl are contained in each solution? a. 0.556 L of a 2.3 M KCl solution
문제 27b
How many moles of KCl are contained in each solution? b. 1.8 L of a 0.85 M KCl solution
문제 27c
How many moles of KCl are contained in each solution? c. 114 mL of a 1.85 M KCl solution
문제 29a
What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? a. 0.45 mol ethanol
문제 29b
What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? b. 1.22 mol ethanol
문제 29c
What volume of 0.200 M ethanol solution contains each amount in moles of ethanol? c. 1.2⨉10-2 mol ethanol
문제 31
A laboratory procedure calls for making 100.0 mL of a 1.30 M K2SO4 solution. What mass of K2SO4 (in g) is needed?
문제 33
A chemist wants to make 3.00 L of a 0.250 M NaNO3 solution. What mass of NaNO3 (in g) should the chemist use?
문제 35
If 255 mL of a 2.25 M sucrose solution is diluted to 800.0 rnL, what is the molarity of the diluted solution?
문제 37
If 2.50 L of a 4.80 M MgBr2 solution is diluted to 35.0 L, what is the molarity of the diluted solution?
문제 39
To what volume should you dilute 50.0 mL of a 12 M stock HNO3 solution to obtain a 0.100 M HNO3 solution?
문제 40
What is the minimum amount of 6.0 M H2SO4 necessary to produce 25.0 g of H2(g) according to the reaction between aluminum and sulfuric acid? 2 Al(s) + 3 H2SO4(aq) → Al2(SO4)3(aq) + 3 H2(g)
문제 42
Consider the reaction: Li2S(aq) + Co(NO3)2(aq) → 2 LiNO3(aq) + CoS(s) What volume of 0.150 M Li2S solution is required to completely react with 225 mL of 0.175 M Co(NO3)2?
문제 44
What is the molarity of ZnCl2 that forms when 25.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 275 mL. Zn(s) + CuCl2(aq) → ZnCl2(aq) + Cu(s)
- A 25.0-mL sample of a 1.20 M potassium chloride solution is mixed with 15.0 mL of a 0.900 M lead(II) nitrate solution and this precipitation reaction occurs: 2 KCl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2 KNO3(aq). The solid PbCl2 is collected, dried, and found to have a mass of 2.45 g. Determine the limiting reactant and the theoretical yield.
문제 45
문제 45c
A 25.0-mL sample of a 1.20 M potassium chloride solution is mixed with 15.0 mL of a 0.900 M lead(II) nitrate solution and this precipitation reaction occurs: 2 KCl(aq) + Pb(NO3)2(aq) → PbCl2(s) + 2 KNO3(aq) The solid PbCl2 is collected, dried, and found to have a mass of 2.45 g. Determine the the percent yield.
문제 46
A 55.0-mL sample of a 0.102 M potassium sulfate solution is mixed with 35.0 mL of a 0.114 M lead(II) acetate solution and this precipitation reaction occurs: K2SO4(aq) + Pb(C2H3O2)2(aq) → 2 KC2H3O2(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 1.01 g. Determine the limiting reactant, theoretical yield, percent yield.
문제 47
For each compound (all water soluble), would you expect the resulting aqueous solution to conduct electrical current? a. RbBr b. Na3OH c. C12H22O11 d. MgSO4
문제 48
Classify each compound as a strong electrolyte or nonelectrolyte. a. K2SO4 b. C6H12O6 c. K2CO3 d. CH3OH
문제 49
Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. a. AgNO3 b. Pb(C2H3O2)2 c. KNO3 d. (NH4)2S
문제 50
Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. a. AgI b. Cu3(PO4)2 c. CoCO3 d. K3PO4
- Complete and balance the following equation. If no reaction occurs, write “NO REACTION.” NaOH(aq) + FeCl3(aq) → ?
문제 51