Concept explainers
Boric acid (
(a) Write a balanced equation for the reaction with water in which
(b) Write a balanced equation for the reaction with water in which
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Chemistry
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- The active ingredient of bleach such as Clorox is sodium hypochlorite (NaClO). Its conjugate acid, hypochlorous acid (HClO), has a Ka of 3.0 × 10–8. (a)The undiluted bleach contains roughly 1 M NaClO. Calculate the pH of 1 M NaClO solution. (b)Some applications require extremely diluted bleach solution, such as swimming pools. Suppose the solution in (a) is diluted by 10,000 -fold. Calculate the pH of the diluted solution, and demonstrate that you can still neglect the autoionization of water in your calculation. (c)Suppose the solution in (a) is diluted by 1million-fold, briefly explain how your approach will be different. Write the equation with [H3O+] as the unknown, but you do not need to solve it.arrow_forwardChemists working with fluorine and its compounds some- times find it helpful to think in terms of acid-base reac- tions in which the fluoride ion (F¯) is donated and ассеpted. (a) Would the acid in this system be the fluoride donor or fluoride acceptor? (b) Identify the acid and base in each of these reactions: CIF;O2 + BF; CIF,O, · BF, -- TiF, + 2 KF – K2[TiF,]arrow_forwardPhosphoric acid (H,PO4) is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that phosphoric acid can undergo when it's dissolved in water.arrow_forward
- calculate the pH of the following solution; (a)2.8 × 10–⁴M Ba (OH)2 (b) 5.2 × 10–⁴M HNO3·arrow_forwardTake about 5 ml of dil. HCl in a test tube and add a few pieces of fine granules to it.Which gas is evolved?(a) Chlorine(b) Hydrogen(c) HCl(d) Nitrogenarrow_forward8. (a) HA(aq) is a weak acid with a dissociation constant, Ka, of 8.8 x 10−12. What is the pH of a 0.022 M solution of A−(aq)? The temperature is 25 ◦C. (b) For the reaction A(g) =A(l), the equilibrium constant is 0.666 at 25.0 ◦C and 0.222 at 75.0 ◦C. Making the approximation that the entropy and enthalpy changes of this reaction do not change with temperature, at what temperature will the equilibrium constant be equal to 0.777?arrow_forward
- What is the pH of a 0.20 M solution of CH3NH3NO3 at 25 °C? At this temperature, the Kp for CH3NH2 is 4.4 x 104 and the Ka for HNO3 is 2.4.arrow_forwardCalculate the pH of 2.5 M CH2ClCOOH(aq) given that its Ka = 0.0014.arrow_forwardIf the Kb for hydrazine, N2H4(aq), is 1.7 x 10-6 , calculate the pH of a 1.8 mol/L solution of hydrazine.arrow_forward
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