Concept explainers
Interpretation:
The concentration of
Concept introduction:
In a
It is represented as
Also, the concentration of liquid and solid is not considered in the equilibrium constant expression.
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INTRODUCTORY CHEMISTRY
- A solution is formed by adding 2.70 grams of solid sodium hypochlorite, NaClO, to 200.0 ml of 0.0210M calcium hypochlorite, Ca(ClO)₂. Calculate the pH of the resulting solution. You may assume that the sodium hypochlorite dissolve completely and that the change in volume is negligible with the addition of the solid.arrow_forward5 A chemistry graduate student is given 450. mL of a 0.10M ammonia (NH3) solution. Ammonia is a weak base with K, = 1.8 × 10. What mass of NH4Cl should the student dissolve in the NH3 solution to turn it into a buffer with pH = 9.11? You may assume that the volume of the solution doesn't change when the NH4Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. ☐ ☐ x10arrow_forwardMethanoic acid is also called formic acid. It has the chemical formula HCOOH(l). It is a colourless fuming liquid that is mainly used as a preservative. It exhibits the following equilibrium in water:HCOOH(aq) + H2O(l) → HCOO–(aq) + H3O+(aq) 1) A 4.50 g tablet of magnesium hydroxide neutralizes 400.0 mL of stomach acid, HCl. What is the concentration of HCl in the stomach? PLEASE HELP WITH THIS ITS EXTREMELY URGENTarrow_forward
- 000O Solution X has a pH value of 2. Your teacher adds a chemical to the solution and the new pH is 8. The new solution can be described as having O more H+ ions more CO, O more OH ions more H,0 moleculesarrow_forwardDetermine the pH of a 1.497 M solution of potassium cyanide (KCN) in water. Ka for HCN is 6.17 × 10–10. Enter your response in pH units to the nearest 0.01.arrow_forwardFormic acid, HCOOH, ionizes in water according to the following equation. The equilibrium constant is K = 1.8 × 10–4. $$HCOOH(aq)+H2O(l)HCOO−(aq)+H3O+(aq) Calculate the equilibrium concentration of H3O+ in a 0.985 M solution. Marrow_forward
- Given 0.01 M solutions of each of the following acids, which solution would have the lowest pH? -117 Hypoiodous acid (HOI), K = 2.3 x 10 Hypobromous acid (HOBr), K = 2.5 x 10 Lactic acid (HC₂H₂O₂), K = 1.3 x 10 Chlorous acid (HClO₂), K = 1.1 x 10²arrow_forwardA chemical system is set up by placing some solid ammonium chloride in an ammonia solution. The equilibrium established can be represented as follows: NH4*(aq) + H2O(e) 2 H30*(aq) + NH3(aq) The pH of the solution is taken, then a small amount of NaOH(aq) is added and the pH is taken again. What can be said about the change in pH for the solution? The pH significantly increases because a strong base has been added to the solution. The pH significantly decreases because a strong base has been added to the solution. There is very little change to the pH of the solution. If anything the pH of the solution decreases slightly. There is very little change to the pH of the solution. If anything the pH of the solution increases slightly.arrow_forwardThe pH of a solution of Ba(OH)2 was 11.489. What was its concentration?arrow_forward
- The ionization constant (Kb) of aniline (C6H5NH2) 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?arrow_forwardIndicate how the concentration of each aqueous species in the chemical equation changes to reestablish equilibrium after changing the concentration of a reactant or product. Also indicate how the pH changes. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration. HC\(aq)+H,O()=CN (aq)+H,0*(aq) pH after the concentration of HCN is increased after the concentration of CN is decreased Answer Bank careers privacy poliy thelp 口 )arrow_forwardThe barium oxide is a strong electrolye: BaO(s) + H2O(l) → Ba2+(aq) + 2 OH−(aq). What is the pH of a solution prepared by dissolving 0.175 g of solid BaO in enough water to make 1.00 L of aqueous solution (at 25°C)? Enter your answer in decimal format with two decimal places (value ± 0.02). The answer is 11.36 would like an explanation to this problem please.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning