1. Which of the following ions will react with water in a hydrolysis reaction: Na+, Ca2+,...

1. Which of the following ions will react with water in a hydrolysis reaction: Na+, Ca2+, Cu2+, Zn2+, F-, SO32-, Br-

2. For those ions in question 1 that undergo hydrolysis, write net ionic equations for the hydrolysis reaction(s).

3. The Ka for HCN is 4.9x10-10. What is the value of Kb for CN-? Write the 2 equilibrium expressions and chemical equations.

4. What are the conjugate base and conjugate acid of H2PO4-? Look up the different Ka values for phosphoric acid, a polyprotic acid. Explain the trend in the Ka values based on the chemical structures of the species involved in each proton dissociation.

5. From what acid and what base were the following salts made? Write the reaction that would produce the salts below.

CaSO4 ____________________________________________________________

NH4Br ____________________________________________________________

BaCl2 ____________________________________________________________

8. Define the term salt.

7. Tell whether 0.1 M solutions of the following salts would be acidic, neutral, or basic:

BaCl2 ___________________________________________________________

CuSO4 __________________________________________________________

(NH4)2SO4 _______________________________________________________

ZnCl2 ___________________________________________________________

NaCN ___________________________________________________________

8. What is the pH of a solution that is 0.10 M HC2H3O2 and 0.20 M NaC2H3O2? Ka for acetic acid is 1.8x10-5.

Expert Solution

queen_honey_blossom answered 2 years ago

Water softeners remove metal ions such as Ca2+ and Fe3+ by replacing them with enough Na+...

Water softeners remove metal ions such as Ca2+ and Fe3+ by replacing them with enough Na+ ions to maintain the same number of positive charges in the solution. If 5.5*103 L of hard water is 0.015 M Ca2+ and 0.0010 M of Fe3+ , how many moles of Na+ are needed to replace these ions?

Which would be the best emulsifier of soil if soft water (no Ca2+ ions, Mg2+ ions,...

Which would be the best emulsifier of soil if soft water (no Ca2+ ions, Mg2+ ions, and so on) were used? a. A soap. b. A detergent. c. Both would be about the same. Explain your answer: ________________________________

Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to...

Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to add phosphates. The phosphate ion forms insoluble precipitates with calcium and magnesium ions, removing them from solution. Suppose that a solution is 0.049 M in calcium chloride and 0.094 M in magnesium nitrate. What mass of sodium phosphate would have to be added to 1.4 L of this solution to completely eliminate the hard water ions? Assume complete reaction. Enter a numerical answer in...

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as...

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+ ions in the water sample in ppm CaCO3?

The hydrolysis of table sugar (sucrose) occurs by the following overall reaction sucrose + water →...

The hydrolysis of table sugar (sucrose) occurs by the following overall reaction sucrose + water → glucose + fructose and is first order in sucrose concentration with a rate constant of 3.50 × 10⁻³ min⁻¹. If a 0.500 M solution of sucrose is allowed to react for 345 min, what will be the average rate of production of glucose over that period of time in units of M/min?

2- a) Assume the following concentrations of Na+ and K+ ions: [Na+]o = 120 mM, [Na+]i...

2- a) Assume the following concentrations of Na+ and K+ ions: [Na+]o = 120 mM, [Na+]i = 6 mM, [K+]o = 2 mM, and [K+]i = 150 mM. Assume further that at the peak of the action potential, pK : pNa is 1 : 12. Calculate Vm at the peak of the action potential.(Use Goldman-Hodgkin-Katz equation, disregard Chlorine ion) b) Explain the molecular basis of the neuronal refractory periods. That is discuss both the absolute refractory period and the relative...

Hydrogen produced from a hydrolysis reaction was collected over water and the following data was compiled....

Hydrogen produced from a hydrolysis reaction was collected over water and the following data was compiled. Total volume of H2(g): 96.62 mL Temp: 28.0C Bariometric Pressure: 7.40x10^2 mmHg Vapor pressure of water at 28C: 28.5 mmHg Calculate the moles of hydrogen gas produced by the reaction.

a) What is the final proudct of polyphosphonate hydrolysis? b) HCl in natural water can react...

a) What is the final proudct of polyphosphonate hydrolysis? b) HCl in natural water can react with solid CaCO3 and increase the hardness and alkalinity in water. What reaction shows how HCl increases the hardness of water and its alkalinity? If 1 mM HCl is present as an anthropogenic contaminant in water with solid CaCO3, what is the hardness of water after equilibration?

Which of the following ions will act as a weak base in water?

Which of the following ions will act as a weak base in water?HS-ClO-F-NO2-All of the above will act as a weak base in water.

For the following reaction, 12.6 grams of sodium are allowed to react with5.96 grams of water....

For the following reaction, 12.6 grams of sodium are allowed to react with5.96 grams of water. sodium(s) + water (I) ---> sodium hydroxide (aq) + hydrogen (g) What is the maximum amount of sodium hydroxide that can be formed? in grams What is the formula for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? in grams

Question