Concept explainers
(a)
Interpretation: Write balanced chemical equation for the given reactions and also predict whether precipitate will form or not.
Concept introduction: Precipitation reaction takes place when anions and caations present in the solution combine to form insoluble salt. The salt will be soluble or insoluble depends upon the
Generally chlorides, bromides, iodides of
(b)
Interpretation: Write balanced chemical equation for the given reactions and also predict whether precipitate will form or not.
Concept introduction: Precipitation reaction takes place when anions and caations present in the solution combine to form insoluble salt. The salt will be soluble or insoluble depends upon the
Generally chlorides, bromides, iodides of
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Chemistry & Chemical Reactivity
- A solution is 1.5 104 M Zn2 and 0.20 M HSO4. The solution also contains Na2SO4. What should be the minimum molarity of Na2SO4 to prevent the precipitation of zinc sulfide when the solution is saturated with hydrogen sulfide (0.10 M H2S)?arrow_forwardCalcium ions in blood trigger clotting. To prevent that in donated blood, sodium oxalate, Na2C2O4, is added to remove calcium ions according to the following equation. C2O42(aq)+Ca2+(aq)CaC2O4(s)Blood contains about 0.10 mg Ca2+/mL. If a 250.0-mL sample of donated blood is treated with an equal volume of 0.160 M Na2C2O4, estimate [Ca2+] after precipitation. (KspCaC2O4=4109)arrow_forwardHow do the concentrations of Ag+ and CrO42- in a saturated solution above 1.0 g of solid Ag2CrO4 Change when 100 g of solid Ag2CrO4 is added to the system? Explain.arrow_forward
- Each pair of ions below is found together in aqueous solution. Using the table of solubility product constants in Appendix J, devise a way to separate these ions by adding a reagent to precipitate one of the ions as an insoluble salt and leave the other in solution. (a) Cu2+ and Ag+ (b) A13+ and Fe3+arrow_forwardA volume of 50 mL of 1.8 M NH3 is mixed with an equal volume of a solution containing 0.95 g of MgCl2. What mass of NH4Cl must be added to the resulting solution to prevent the precipitation of Mg(OH)2?arrow_forward31. (a) Calculate the pH of a mixture containing 0.1 M propanoic acid (CH3CH₂COOH) and 0.050 M sodium propanoate (CH3CH₂COONa) (b) Determine the change in pH that occurs when 0.15 mol solid NaOH is added to 1.00 litre of the buffered solution. 32. (a) Calculate the pH of a buffer solution produced by adding 3.28 g of sodium ethanoate to 1 dm3 of 0.01 M of ethanoic acid (Ka = 1.84x 10-5 at 300K) (b) calculate the pH of this buffer if 10 cm3 of 0.1 M HCl are now addedarrow_forward
- (5) a) A nitrous acid/sodium nitrite buffer solution is prepared. 20.0 mL of 6.50 M nitrous acid (HNO2) and 8.52 g of sodium nitrite (NaNO2, molar mass 68.99 g/mol) are placed in a 250. mL volumetric flask. The flask is filled to the mark with water and inverted 10 times to mix thoroughly. What is the pH of this buffer? Take Ka for Nitrous Acid to be 4.52 x 10-4. pH: b) 2.00 mL of a 2.50 M solution of NaOH is added to 75.0 mL of the buffer prepared above. What is the pH of this solution? How much did the pH change? pH: change in pH: c) What is the pH of pure distilled water (just give the pH, no calculations are necessary). d) If 2.00 mL of 2.50 M…arrow_forwardConsider the titration of 25.0 mL of 0.124 M acetic acid (CH₂COOH, pK, = 4.75) with 0.125 M NaOH. CH3COOH(aq)+NaOH(aq) CH₂COO (aq) + H₂O(l) + Na+ (aq) Determine the initial pH of the 0.124 M acetic acid solution before NaOH is added. pH = Determine the pH of the solution after 10.0 mL of 0.125 M NaOH is added. pH = Determine the volume of 0.125 M NaOH required to reach halfway to the stoichiometric point of the titration. volume NaOH: - Determine the pH of the solution when enough NaOH has been added to reach halfway to the stoichiometric point. pH = Determine the volume of 0.125 M NaOH that is required to reach the stoichiometric point of the reaction. volume NaOH: Calculate the pH of the solution when the stoichiometric point of the titration has been reached. pH = mL mLarrow_forwardGiven the equation Ag+(aq)+2NH3(aq)⟶[Ag(NH3)2]+(aq)?f=2.00×107 determine the concentration of NH3(aq) that is required to dissolve 545 mg of AgCl(s) in 100.0 mL of solution. The ?sp of AgCl is 1.77×10−10.arrow_forward
- Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO₂H, in enough water to make 1.00 x 102 mL of solution and then titrate the solution with 0.133 M NaOH. C6H5CO₂H(aq) + OH(aq) C6H5CO₂ (aq) + H₂O(f) What are the concentrations of the following ions at the equivalence point? Na+, H₂O+, OH C6H5CO₂ 0.0168 ✓ M Na+ 1.82e-8 M H3O+ 5.45e-7 × MOH 0.0168 M C6H5CO₂ What is the pH of the solution? 7.74arrow_forwardWhat is the molar solubility of a hypothetical compound AB in pure water given a Kap = 6.4x 102? AB(s) =A'(aq) + B'(aq)arrow_forwardA buffer solution contains 0.50 M acetic acid (CH3COOH; Ka = 1.8 x 10–5) and 0.35 M sodium acetate, NaCH3CO2. What is the pH of the solution? (A) 4.59 (B) 4.90 (C) 2.29 (D) 2.52arrow_forward
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