3. At 25 °C, the groundwater is saturated with CO2 at a partial pressure of 0.2 atm. The pH of the groundwater is 5.80. Please estimate the concentration of calcium (Ca) in the groundwater sample.
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- 7) An aqueous solution containing 25.0 mg of a hormone in 150.0 mL of solution with an osmotic pressure at 25 °C of 9.00 mmHg. What is the molecular weight of the hormone? 8) (a) What is the pH of a solution in which 45 mL of 0.10 M sodium hydroxide is added to 25mL of 0.15M hydrochloric acid? (b) A brand of carbonated beverage has a pH of 3.50. Calculate [H*]=?A 0.437 M solution of a weak base has a pH of 11.94. What is the base hydrolysis constant, Kp, for the weak base?What is the pH (to two decimal places) of a saturated aqueous solution of LiF (at 25 °C)? Ksp = 3.8 × 10–3; Ka(HF) = 6.67 × 10–4
- 3.134 grams of potassium sorbate (KCH3(CH,)4CO2 ) is fully dissolved in 100.00 mL of water, which is carefully transferred to a conical flask. Then 100.00 mL of 0.240 M HNO, is added dropwise to this solution from a burette. Given: K, (sorbic acid) = 1.7 x 10-5. Showing all your calculations and reasoning, determine the pH of the solution that results after the addition of all the acid mentioned above.The ionization constant (Kb) of aniline (C6HSNH2) is 2.35 x 10-5. If 7.285 grams of aniline is dissolved in 100.0 mL of water, what are the equilibrium concentration of all species present?Propanoic acid, CH₂CH₂COOH, is a weak monoprotic acid that is used to inhibit mould formation in bread. A student prepared a 0.10 mol/L solution of propanoic acid and found that the pH was 2.96. What is the acid dissociation constant for propanoic acid? [Hint: Setup an I.C.E. table] CH3CH₂COOH (aq) Ka for propanoic acid is: ←CH3CH₂COO (aq) + H (aq)
- Help me please2.00 liters of ammonia at 30.0 °C and 0.200 atm is neutralized by 134 ml of sulfuric acid solution. Calculate the molarity of the acid solution.1. The ionization constant (K») of aniline (C6HSNH2) is 2.35 x 10-5, If 7.285 grams of aniline is dissolved in 100.0 mL of water, what are the equilibrium concentration of all species present? 2. A certain acidic vitamin is essential for all mammals since it plays a role in DNA repair and cell signaling. A 0.439 M solution of this acid is found to have a pH of 2.607. Based on the table below, what most likely is the identity of this unknown acid?
- Groundwater containing 0.0001468 M of Mg2+ is at equilibrium. Use the solubility constant Ksp=1.35×10−11. Assuming no other ions are present, what is the equilibrium pH? Round the final answer to only 2 decimals places.Calculate the equilibrium molar concentrations of trichloroacetic acid in an aqueous solution that contains 284.9 mg of trichloroacetic acid,Cl3CCOOH (163.4 g/mol), in 15 mL (the acid is 73.0% ionized in water). Indicate unitsBaking powder contains sodium bicarbonate plus an acidic salt like sodium acid tartrate or calcium acid phosphate. Suggest how baking powder can "raise" breads and pastries when mixed with water and heated.