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Rank the following in order of increasingradius:(a) O²⁻, F⁻, Na⁺(b) S²⁻, P³⁻, Cl⁻
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- Q1. A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give 775 mL. Calculate (a) the molar analytical concentration of K-Fe(CN)6- (b) the molar concentration of K+. (c) the molar concentration of Fe(CN) (d) the weight/volume percentage of K3Fe(CN)6. (e) the number of millimoles of K1 in 50.0 mL of this solution. (f) ppm Fe(CN)6¹Calculate the molarity of the following solutions: (a) 0.80 mol of solute in 118 mL of solution (b) 2.15 mol of CaCl2 in 5.01 L of solution (c) 287 g of C6H12O6 in 770 . mL of solution (d) 114 . g of MgSO4 · 7 H2O in 4.26 L of solution (There's a multiplication sign in the middle of MgSO4 and 7H2O)Given the reaction : 2H3PO4(aq) + 3K2CO3 (aq)→ 3CO2 (g) + 3H2O(l) + 2K3PO4(aq) (c)Write the balanced complete ionic equation for the reaction (d)Write the balanced net ionic equation for the reaction
- What is the number of equivalents of sodium in 0.806 moles of Na3PO4(aq)?Calculate the molarity of the following solutions: (a) 0.31 mol of solute in 84.7 mL of solution (b) 1.59 mol of KBr in 0.81 L of solution (c) 34.2 g of NaC2H3O2 in 1.93 L of solution (d) 70 . g of CuSO4 · 5H2O in 2.1 L of solution2. An alcohol solution contains 35.0 g of 1-propanol (C3H70H) and 150 g of ethanol (C2H5OH). (a) Calculate the mass percent. (b) Assuming that the volume of solute and solvent are additive, what is the volume percent of each alcohol. The density of 1-propanol and ethanol are 0.803 g/mL and 0.789 g/mL, respectively.
- Given the reaction : 6KOH(aq) + Fe2(SO4 )3(aq)→ 2Fe(OH)3(s)+ 3K2SO4(aq) (14 pts) (a)Write the balanced complete ionic equation for the reaction (b)Write the balanced netionic equation for the reactionConsider the following balanced redox reaction:2CrO₂⁻(aq) +2H₂O(l)+6ClO⁻(aq)→ 2CrO₄²⁻(aq) +3Cl₂(g) +4OH⁻(aq)(a) Which species is being oxidized?(b) Which species is being reduced?(c) Which species is the oxidizing agent?(d) Which species is the reducing agent?(e) From which species to which does electron transfer occur?(f) Write the balanced molecular equation, with Naas the spec-tator ion.For each of the following balanced equations, write the oxidation number above the symbol of each atom that changes oxidation state in the course of the reaction. (a) N,O4(g) + KCI(s) → NOCI(g) + KNO3(s) (b) H,S(g) + 4 O̟F2(s) – (c) 2 POB13(s) + 3 Mg(s) → 2 PO(s) + 3 MgBr2(s) (d) 4 BCI3(g) + 3 SF4(g) · → SF,(g) + 2 HF(g) + 4 O2(g) 4 BF3(g) + 3 SCI2(t) + 3 Cl2(g)
- (a) Calculate the mass percentage of NaNO3 in a solution containing 13.6 g of NaNO3 in 834 g of water. (b) An alloy contains 2.86 g of chromium per 100 kg of alloy. What is the concentration of chromium?Find the mass in grams of sodium hydroxide that will be required to prepare a solution with a concentration of 0.500 mol·dm⁻³ in a 250 cm³ volumetric flask. [Round the answer to three decimal places. Do not type in the unit. Use a decimal point.] *(1) To analyze the concentration of chloroform precursors, or natural organic matter, in a drinking water sample, which of the following instruments should be used? (A) TOC analyzer (B) GC (C) AA (D) IC (2) To analyze the concentration of cadmium (Cd) in a water sample, which of the following instruments should be used? (A) TOC analyzer (B) GC (C) AA (D) LC (3) To analyze the concentration of the chlorine residual in a water sample, which of the following instruments should be used? (A) TOC analyzer (B) GC (C) AA (C) AA (D) IC (4) To identify an unknown organic compound in drinking water, which of the following instruments should be used? (A) TOC analyzer (B) GC (D) IC (E) DPD Method (C) conductivity (E) GC/MS (5) To evaluate the quality of a drinking water sample, which of the following parameters may NOT be tested? (A) TSS (B) turbidity (D) TOC (E) coliforms