3) Which of the following is a precipitation reaction? A) Nal(aq) + AGNO3(aq) → Agl(s) + NaNO3(aq) B) HBr(aq) + LIOH(aq) C) Cu(s) + 2 AgNO{(aq) D) 2HCI(aq) + Na,SO:(s) → - LiBr(aq) + H20(1) → 2 Ag(s) + Cu(NO3)½(aq) 2NaCl(aq) + H20() + SO2(g)

Classify the following unbalanced chemical reactions as neutralization or precipitation reactions.

Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. The following molecular equation represents the reaction that occurs when aqueous solutions of silver(1) nitrate and sodium iodide are combined. AgNO3(aq) + Nal (aq) →→→Agl (s) + NaNO3(aq) Write the balanced net ionic equation for the reaction. + + + +

Determine net ionic equations, if any, occuring when aqueous solutions of the following reactants are mixed. Nickel(II) chloride and lead(II) nitrate; Pb2+(aq) + 2Cl-(aq) -> PbCl2(s) Ammonium sulfate and barium nitrate; Ba2+(aq) + SO42-(aq) -> BaSO4(s) Copper(II) sulfate and ammonium carbonate; No reaction occurs. Sodium bromide and hydrochloric acid; Na+(aq) + Cl-(aq) -> NaCl(s) Calcium acetate and sodium carbonate; Ca2+(aq) + CO32-(aq)  CaCO3(s)

By titration, it is found that 39.1 mL of 0.161 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

Which of the following is a precipitation reaction?     Zn(s) + 2 AgNO3(aq) → 2 Ag(s) + Zn(NO3)2(aq)     NaCl(aq) + LiI(aq) → NaI(aq) + LiCl(aq)     2 KI(aq) + Hg2(NO3)2(aq) → Hg2I2(s) + 2 KNO3(aq)     HBr(aq) + NaOH(aq) → NaBr(aq) + H2O(l)     None of these is a precipitation reaction.

The hydronium ion concentration in a sample of springwater is found to be 5.2 ✕ 10−5 M at 15°C. What is the concentration (in M) of hydroxide ions in the springwater? (Kw = 4.57 ✕ 10−15 at this temperature.)

Jake carried out three titrations to determine the concentration of unknown nitric acid (HNO3) using 0.1050 M NaOH. He titrated 100.0 mL of the nitric acid sample and obtained the following volumes of NaOH: 20.56, 20.48, and 20.52 mL. The acid-base reaction occurring is NaOH (aq) + HNO3(aq) →→ NaNO3(aq) + H2O(l) Determine the concentration of the acid; report the average molarity with standard deviation. Pay attention to the number of significant figures on the mean and the number of decimal places on the standard deviation.

What is the balanced net ionic equation for this reaction. Pb(NO,),(aq) + 2HCI(aq) PBCI, (s) + 2HN0,(aq) HCl and HNO, are both strong acids.

6 a b U d [Tutorial: Titration stoichiometry] This question will walk you through the steps of calculating the volume of titrant required to reach the endpoint based on the volume and concentration of analyte. Consider the standardization of NaOH by titration with C,H,O, according to the following chemical reaction: 3 NaOH(aq) + C,H,O,(aq) = Na,C,H,O,(aq) + 3 H₂O(l) Step 1: Evaluate the question. How many moles of aqueous sodium hydroxide (NaOH) will react to completely neutralize one mole of aqueous citric acid (C,H,O,)? Which equation will be most helpful for solving this problem? Calculate the volume in mL of a 0.200 M NaOH solution needed to neutralize 345 mL of 0.033 MC,H,O, standard solution. Based on the fact that NaOH is a strong base and C,H,O, is a weak acid, how would you describe the pH of the solution at the endpoint, where moles of base = 3 times the moles of acid?