Determination of the dissociation Constant (K_a) of a weak Acid. The pH of a 0.10 M solution of formic acid (HCOOH) is 2.39, what is the K_a of the acid? K_a = Hydrofluoric Acid, A weak Acid with K_a = 7.1 times 10^-4 A. For a 0.50 M solution of HF, calculate the equilibrium concentrations of HF, H^+ and F^-....
1) A 8.65 ⋅ 10-3 M solution of HClO4 is made. -What is the pH of this solution? -What is the pOH of this solution? -What is the [OH-] in the solution? Record this answer in scientific notation using 3 sig figs. 2)A 4.23⋅10-2 M solution of NaOH is made. -What is the pOH of this solution? -What is the...
Please answer these 5 questions. 1) a buffer is made by dissolving (CH3NH3)Cl and CH3NH2 in water. Write equations to show how this buffer neutralizes added H3O+ and OH-. 2) If you add 15.0 mL of 1.25 M NaOH to 250. mL of a 0.200 M propanoic acid (CH3CH2CO2H) solution, what is the pH of the resulting solution? 3)If added...
1) AgCl, FeCO3, Hg2Br2, and PbI2 are compounds that are insoluble in water. Which compound would be more soluble in acidic solution ? Group of answer choices AgCl only FeCO3 only Hg2Br2 only PbI2 only All of the above is more soluble in acidic solution. 2) Which of the following substances form both ions and molecules in solution ? Group...
1. Write the acid dissociation reaction equation for Na2H2PO4. 2. Write a reaction equation showing how the buffer solution maintains pH ~ 8.0 upon addition of acid. 3. Write a reaction equation showing how the buffer solution maintains pH ~ 8.0 upon addition of a base. Buffer solution: Acid= Na2H2PO4 base Na2HPO4 4. Would you expect this buffer to be...
Hydrogen cyanide (HCN), sometimes called prussic acid, is a colorless, extremely poisonous and flammable liquid that boils slightly above room temperature (25.6 °C). HCN is produced on an industrial scale and is a highly valuable precursor to many chemical compounds ranging from polymers to pharmaceuticals Determine the pH of a buffer solution is prepared by mixing 125 ml of 0.080...
A 120.0-mL aliquot of 0.114 M weak base B (pKb = 4.58) was titrated with 1.14 M HClO4. Find the pH at the following volumes of acid added: Va = 0.00, 1.30, 6.00, 11.00, 11.90, 12.00, 12.10, and 17.00 mL. (Assume Kw = 1.01 ✕ 10−14.)
What are volumetric pipets and burets and what are they used for? 1. 2. To what volume are you to record the values from the buret? 3. 0.3811 g sample of KOH will just neutralize what volume of 0.2000 M HS02 Write the balanced chemical equation. a. b. What volume of 0.2000 M H SO, will just neutralize the KOH...
0.JP Question 10 What is the final volume{ in ml) so that a 10 mL solution of HClO4 at pH 2 changes the pH to 4? O 100 ml 990 ml 1000 ml 10 ml 20 ml • Previous N No new data to save. Last checked at 10:46 am
An aqueous solution contains 0.30 M ammonium bromide. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.)which of the following are accurate 0.14 mol HClO4 0.071 mol Ba(OH)2 0.30 mol HClO4 0.29 mol CaBr2 0.29 mol NH3