Question

11)2SO2(g) + O2(8) 2503(8) For the reaction at equilibrium, ifO2 is removed, the amount of SO2 present 2 is removed, the amount of SO2 present will 11) A) decrease B) increase C) stay the same 12) According to the Arrhenius concept, if HNOs were dissolved in water, it w A) a source of Hions. B) a source of hydroxide ions. C) an acid. D) a base. E) a proton acceptor. vater, it would act as12) 13) The conjugate acid of HSO4 is 13) _ A) H2504 B) H2SO4" CHSO4 D) HSO3 E) 5042 14) The stronger the acid, the A) weaker B) stronger the conjugate base. 14) 15) . 15) Which of the following is correctly identified? A) H2CO3, strong acid B) HCI, weak acid NaOH, strong base D) NH3, strong acid E) Ca(OH)2. weak base 16) Which of the following is the weakest acid? 16) A)HCN (ka for HCN is 4.9 10-10) B) H3BO3 ( Ka for HBO3 is 54 x 10-10) CHCNO (Ka for HCNO is 2 * 10-4) D) HF (Ka for HF is 7.2 x 10-4) Store 17) 17) The Ka for hydrofluoric acid is 7.2 x 10-4. This means that HF is A) ionic. B) able to react with HCI. C) a strong acid. D) neutral in water solution. E) a weak acid. 18) 18) What is the (OH) in a solution that has a [H3O+] - 1 x 10-6 M? A) 1 x 10-12 M B) 1 x 10-2M C) 1 x 10-6 M D) 1 x 10-10 M E) 1 X 10-8 M 19) 19) What is the [H3O+] in a solution that has a [OH-] - 5.0 x 10-2 M? A) 20 = 104M B) 20 x 10-2M

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Answer 1

solution : 2502 (F) + O2(g) = 2593 (5) it is a reverse reaction. SO₂ & O₂ give soz is forward reaction convert to SO₂ & O₂ is backward and So, reaction, At equillibriem it or is removed, then the reaction will go backward direction that is so started to convert so, & Oa, as a result amount of so, will be increased (B) increase. 32

Page HNO _ O # HNO3 = H+ + Noz According to Athening theory Acid. The substance which release is called b48., ism in the aqueous solution called Acid. And which release oH is — Therefore It HNO were dissolved in water it would act like an acid. (C) an acid. 113 Conjugate acid - A conjugate aid is formed by the reception of a proton by a base. conjugake baset it is formed by the release of H+ (proton) by an acid. Hsoy this lone pair can aceept proton. Ho- = o base #-O-S-0- 6 conjugale SSSSS

Page HsOy +ht = H₂SO4 عره طی acid coniugate .. Conjugate acid of How is (a) H₂Soy. - atid the weaker the stronger the aid the conjugate base. he the eig - H₂SO4 is stronger arid . nud - - H₂ Soy Ht the gate base but Asoy is weaker base, because in Hsoy there is an another H atom attached to o atom. So It still able to release H+ ion but at the same time it can accept proton by the minus charge available on the other o atom. So it act like both and as Well as base so it is weaker base. | H, 504_<#7505 -#som (15. ④ H2CO3 -o-Lot It is a weak and (B) Het is strong and due to H ct high polarity of H-cl bond. G NaOH is strong base ..

Pade Page DAH iP 13 is a weak base. It can accept proton/H+) by it's lone pair avalimane on Natom, MHz 4t - Nhy Ca(OH)2 is strong base. acedity=2 Ca(OH), ca²+ + 2OH-