Select all combinations of chemical reagents which make buffer solution(s). NH3 & KOH HCN & HCl...

Select all combinations of chemical reagents which make buffer solution(s).

		NH₃ & KOH
		HCN & HCl
		HCl & HCN
		KCN & NaOH
		KOH & HBr
		HCN & KCN
		HCl & NaOH

Expert Solution

STEP 1 : Buffer solution is an aqueous solution of weak acid and its conjugate base or it can be of weak base and its conjugate acid.

STEP 2 : check the option

Hence, only HCN + KCN will make acidic buffer solution.

queen_honey_blossom answered 2 years ago

1. a)Which of the following statements are TRUE for a buffer solution. Select all that are...

1. a)Which of the following statements are TRUE for a buffer solution. Select all that are True. _ A buffer can be prepared by combining a weak acid and its conjugate base." _ A buffer resists changes in pH. _ When a strong acid is added to a buffer, it reacts with the conjugate base which slightly increases the pH of the solution. 3. Given the following data set: Indicate where the buffere capacity has been exceeded. Solution pH Change...

QUESTION 1 Which pair of compounds will form a buffer in aqueous solution? a. HCN and...

QUESTION 1 Which pair of compounds will form a buffer in aqueous solution? a. HCN and NaCN b. NaCN and NaOH c. HCl and NaOH d. HCl and NaCl e. HCN and HCl f. NaCN and KCN 10 points QUESTION 2 A buffer solution is titrated with 0.032 M HCl solution. The initial volume of the buffer is 25.00 mL. The equivalence point of the titration is determined to be 4.88 mL. What is the concentration of conjugate base...

CN-(aq)+NH4(aq) <-> HCN(aq) + NH3(aq) A solution is prepaired with all reactants at 0.45M and all...

CN-(aq)+NH4(aq) <-> HCN(aq) + NH3(aq) A solution is prepaired with all reactants at 0.45M and all products at 0.25M a) Calculate (delta)Go and K (at 298K) b) Calculate Q and G and indicates in what direction the reaction will proceed c) Determine the concentrations once equilbrium is reached d) What would be the effect of heating the solution at equilbrium.

Which of the following combinations would make a buffer closest to pH 9.0? HClO2 Ka =...

Which of the following combinations would make a buffer closest to pH 9.0? HClO2 Ka = 1.1 x 10-2 NH3 Kb = 1.8 x 10-5 HNO2 Ka = 7.2 x 10-4 C5H5N Kb = 1.5 x 10-9 A. Equal volumes of 0.10 M HNO2 and 0.10 M NaNO2 B. Equal volumes of 0.10 M C5H5NH+Cl- and 0.10 M C5H5N C. Equal volumes of 0.10 M NH4Cl and 0.10 M NH3 D. Equal volumes of 0.10 M HClO2 and 0.10 M NaClO2

If 100.mL of 0.035 M HCl solution is added to 220.mL of a buffer solution which...

If 100.mL of 0.035 M HCl solution is added to 220.mL of a buffer solution which is 0.20M in NH3 and 0.18M in NH4Cl, what will be the pH of the new solution? The Kb of NH3 is 1.8x10^-5. Please explain how the answer was obtained. Thank you!

Which substances given below produce a basic solution when dissolved in water? NaCl KOH Sucrose NH3...

Which substances given below produce a basic solution when dissolved in water? NaCl KOH Sucrose NH3 Vinegar Suppose an everyday chemical reacts with vinegar. Is the substance more likely to be an acid or a base? Justify your answer.

You wish to make a buffer solution with a pH of 3.5. Which of the following...

You wish to make a buffer solution with a pH of 3.5. Which of the following acids (and a salt of its conjugate base) would be the most ideal choice? Acid A (Ka = 3.2 x 10^-3) Acid B (Ka = 7.1 x 10^-4) Acid C (Ka= 1.4 x 10^-5) Acid D (Ka = 8.5 x 10^-6)

Which solution should be mixed with 50.0 mL of 0.100M ammonia, (NH3), to make an effective...

Which solution should be mixed with 50.0 mL of 0.100M ammonia, (NH3), to make an effective buffer? Select one: a. 50.0 mL of 0.200 M HCl b. 25.0 mL of 0.200 M HCl c. 50.0 mL of 0.100 M HCl d. 25.0 mL of 0.100 M HCl

5. Which of the following solutions when mixed will make a practical buffer solution? a) 1...

5. Which of the following solutions when mixed will make a practical buffer solution? a) 1 mole of NaOH and 0.5 mole of HBrO2 in 1L b) 1 mole of HCl and 1.5 moles of NH3(aq) in 1L c) 0.10 mole of sodium acetate and 0.10 mole of HCl in 1L d) None 6. A sample of 25.0 mL of 0.030 M NaOH was titrated with sulfuric acid solution and 16.2 mL of titrant was used. The concentration of the...

A student must make a buffer solution with a pH of 1.00. Determine which weak acid...

A student must make a buffer solution with a pH of 1.00. Determine which weak acid is the best option to make a buffer at the specified pH. formic acid,Ka = 1.77 x 10−4, 2.00 M sodium bisulfate monohydrate, Ka = 1.20 x 10−2, 3.00 M acetic acid, Ka = 1.75 x 10−5, 5.00 M propionic acid, Ka =1.34 x 10−5, 3.00 M Determine which conjugate base is the best option to make a buffer at the specified pH. sodium...

Question