4. For unexplained reasons, the distilled water in a lab has a pH of about 6. A solid is added to a sample of the water and dissolves. The pH of the resulting solution is about 6. Which of the following best describes the solute? a. Soluble and dissociated to give OH-. b. Soluble and dissociated to give H3O+. c. Soluble but undissociated. d. Soluble and may or may not be dissociated.   Explain your answer:   3. Gasoline is drawn from the fuel tank of an auto through an inlet tube that is attached to a float that rides on the surface of the gasoline. Which of the following characteristics of water and gasoline might account for this arrangement? a. Water is quite soluble in gasoline. b. Water is insoluble in gasoline and is more dense than gasoline. c. Water is insoluble in gasoline and is less dense than gasoline. Explain your answer:

Q: 1. A buffer solution of pH 7.30 will be prepared from 50.00 mL solution of 0.075 M NaH₂PO4 (K₂ =…

A: Given : pH = 7.30 Ka = 6.3 ×10^-8 Molar mass of NaH2PO4 = 119.0 g/mol Volume = 50.00ml Moles of…

Q: In the acid base titration by using 2.5 M of hydrochloric acid solution . the reading of burette…

A: Given that ,  Concentration of HCl (M1) = 2.5 M  Volume of HCl (V1) = 8 ml Volume of NaOH (V2) = 2…

Q: Which of the following acid and base species, when mixed together in a 1:1 mole ratio, will make a…

A: From the given following options, which will give buffer solution when mixed together in 1:1 mole…

Q: A buffer is a solution that contains both an acid and a base. How can we prevent the acid and base…

A:

Q: is solution is prepared by mixing 25 mL of 0.1 M HCHO2 with 25 mL of .2 M NaCHO2. The pH of the…

A: Given values-> Volume of HCHO2 = 25ml Molarity of HCHO2 = 0.1 M Volume of NaCHO2 = 25 ml Molarity…

Q: A solution of 1.789 M HCl (20.00 mL) is titrated with standardized 1.102 M KOH. After 32.0 mL KOH is…

A: Introduction: Molarity is used to express the concentration of the solution. It is defined as the…

Q: Which of the following is not totally dissociated when mixed with water? HC1 а. d. HF b. НBr е. HNO;…

A: The acid which is not totally dissociated when mix with water is given below.

Q: Which of the following statements about indicators is incorrect? a. An indicator is an organic…

A: C. Phenolphthalein is colorless when the pH > 8 Phenolphthalein is actually colorless below pH 8…

Q: Consider a solution which is 0.20 M in CH3COOH and 0.10 M in CH3COONa. Which of the following…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base .   it…

Q: In part one if you allow your titration to go beyond a faint pink endpoint and it ends up dark pink,…

A: Given:   Trial-1 Trial-2 Molarity of HCl 31.34 31.44

Q: 10) You make a solution that has a final concentration of 0.400 M acetic acid and 0.350 M sodium…

A:

Q: KHP(aq) + NaOH(aq) -> H2O (l) + KNaP(aq) 1. Once the equivalence point is reached, any NaOH that is…

A: The indicator used in the given acid-base titration is Phenolphthalein. Phenolphthalein gives pink…

Q: 5. An Indicator Molecule Br Br OH HO, -Br Br = 4.89 pK. Yellow pH 5.5 Shown above is a molecule…

A: The given molecule is an acid-base indicator.

Q: 16. Describe the steps (including amounts and equipment) needed to create 500.0 mL of 1.5 M HCIO4…

A: Molarity is used to define the concentration of a solute in a solution. Molarity is inversely…

Q: 8. Identify each molecule as an acid or a base, then give the formula for the conjugate base or acid…

A: Given molecules,

Q: 2.84 For each of the following reactions, decide if (i) tendency toward minimum energy favors…

A: When rate of forward direction which is disappearence of reactant will become equal to the rate of…

Q: H.W 1- Calculate the pH of 2 solution prepared by adding 25 ml of 0.IM of NAOH solu. to 30 ml of…

A: NaOH+CH3COOH→CH3COONa+H2O0.025L     0.030L0.1M         0.2MNo. of moles of NaOH=0.025×0.1M=0.0025No.…

Q: Determine the pH of a solution that is 0.45 M CH3COOH and 0.10 M CH3COONa. 1

A: The question is based on the concept of buffer solution. A buffer is a solution which resist any…

Q: A buffer solution is prepared by mixing 15.00 mL of 0.12 M CH3COOH with 9.00 mL of 0.080 M NaOH. a.…

A:

Q: A titration was performed, and the following data was obtained. Determine the identity of the salt…

A: To determine the identity of the salt, we need to calculate the solubility product (Ksp​) using the…

Q: The double indicator method can be applied a. to determine [H2CO3] in carbonated drinks. b. to…

A: To choose the methods where the double indicator method can be applied.

Q: Determine the compound that is expected to be more soluble in acidic solution than in neutral or…

A: Solubility of an ionic compound depends upon the constituent ions. If an ionic compound is acidic in…

Q: 24. A solution is prepared by mixing equal volumes of 0.20M HC,H3O2 and 0.40M Nac,H3O2. Which of the…

A: An aqueous solution consists of a mixture of a weak acid and its conjugate base or vice-versa is…

Q: Which of the following pairs of substances can be used to make a buffer solution? O a. NH3 &…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base .   it…

Q: If 44.0mL of 0.20M HCI solution is titrated with 30.0mL of NaOH. what is the concentration of the…

A:

Q: A 36.9 mL sample of a 0.250 M solution of NaCN is titrated by 0.120 M HCI. K, for CN is 2.0 x 10-.…

A:

Q: A 1.00 M solution of which electrolyte will have pH = 7.00 at 25 C? I. CaBr2 II. NHẠNO3 III. LICN…

A:

Q: C. How would you prepare 50.0 mL of 50.0 mM phosphate buffer pH 7.60 using H3PO4, deionized water…

A: The objective of this question is to determine the quantities of H3PO4, deionized water, and either…

Q: Buffer solutions with the component concentrations shown below were prepared. Which of them should…

A: Given, (E). [CH3COOH] = 0.25 M, [CH3COO-] = 0.25 M(C). [CH3COOH] = 0.75 M, [CH3COO-] = 0.75 M(D).…

Q: The most important way that the pH of the blood is kept relatively constant is а. 2+ by Ca O b. by a…

A:

Q: Ten mL of a stock solution of the bromocresol green indicator is mixed with 10 mL of NaOH. Which of…

A: b) The concentration of the indicator decreases.     The concentration of a solution in molarity…

Q: Calculate the Ca2+ ion concentration needed to precipitate CaF2 from a 0.0025 solution. M from NaF.

A: Given that Conc. of NaF = 0.0025 M Conc. of F– = [NaF]= 0.0025 M   We know that Ksp for CaF2 = 3.9 x…

Q: The AIDS drug zalcitabine (C₁0H₁2NO4N) is a weak base and has a Kb of 1.58x10-10, One normal adult…

A:

Q: 9. An unknown salt is either: NaF, NaCl or NH,CI. When 0.1 mol of the salt is dissolved in 1.0 L of…

A:

Q: Basic aqueous solutions contain higher concentrations of hydroxide ions OH- than pure wa­ter. Which…

A: The given substances are KOH, Ca(OH)2 and CH3CH2OH.

Q: Describe the solution produced when 5.0 mL 1.0 M CH3COOH is mixed with 3.0 mL 2.5 M hydrochloric…

A: Here in this reaction given acid CH3COOH  is a weak acid while HCL is a strong acid acid. So in the…

Q: 3. A 0.50 M solution of a diprotic acid with a pKal = 2.72 and pKa2 = 4.47 is titrated with…

A: Concentration of NaOH = 0.1 M Volume of NaOH = 20 mL pKa1 = 2.72 pKa 2 =4.47

Q: 17. Which of cation forms a hydroxide precipitation with excess NaOH solution? a. Sn+ b. Fe+ с. К*…

A: Note:-ions of  Ca , Mg , Al and Fe forms precipitate with excess of NaOH.

Q: 0.54 gram sample of a solid acid is dissolved in a minimal amount of water and titrated to a…

A: It is an acid – base titration. The complete neutralization reaction is given below.

Q: An organic monoprotic base has a pkp of 8.52. A 10.00 ml sample of 0.36 M base solution is prepared,…

A: We will draw ICE table and then calculate pH.

Q: 4. 250.0 mL. The acid dissociation constant of CH3COOH is 1.799x10-5. Please answer the following…

A: A buffer is a solution which resist any change in pH on adding a small amount of acid or base . it…

Q: 1. Write a balanced equation for each of the following neutralization reactions a HSO, and RBOH H2…

A:

Q: An acid solution is made by diluting 30.6 mL of 0.2360 HI to 1.000 L. 1. What is the pH of this…

A: pH measures the acidity of the solution. The concentration of hydronium ion. pH determined as…

Q: 12. additive. A. B. C. A solution is formed by mixing 20.00 mL of 0.2227 M NaOH and 30.00 mL of…

A:

Q: Which of the following elements would have the greatest electron affinity? a. carbon b. охygen c.…

A:

Q: 31. Select the BEST statement regarding a buffer solution from the following. *

A: Buffer solutions:  Buffer solution is actually a mixture of weak acid and its salt with strong base…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.