The K_a for hydrofluoric acid is 7.2 times 10^-4. This means that HF is a weak a

Question

The K_a for hydrofluoric acid is 7.2 times 10^-4. This means that HF is a weak acid neutral in water solution a strong acid ionic able to react with HCl The stronger the acid, the the conjugate base. stronger weaker What is the pH of a solution with [OH^-] = 1 times 10^-4 M? sodium carbonate gives a basic solution in water. True false The neturalization reaction between Al(OH)_3 and NHO_2 produces the salt with the formula NO_3OH AlNO_3 Al(NO_3)_3 H_2O AlH_2 The name given to an aqueous solution of HClO_2 is hydrochloric acid In a neutralization reaction two acids react to form water. water and a salt react to form an acid and a base. an acid and a base to form a salt and water. an acid and a slat react to form water and a base. a base and a salt to from water and an acid. In which of the following are the pH values arranged from the most acidic to the most basic? 14, 10, 7, 1, 3, 5 7, 10, 14, 4, 3, 1 2, 5, 7, 9, 10, 11 14, 10, 7, 4, 3, 1 1, 3, 6, 8, 11, 14 Which of the following is correctly identified? Ca(OH_2), weak base NH_3, strong acid HCl, weak acid H_2CO_3, strong acid NaOH, strong base In a neutralization reaction, how many moles of HClO_4 react with 1 mole of Al(OH_3)? 1 2 3 4 5

Explanation / Answer

1) Smaller the Ka value weaker is the acid. Hence HF is a Weak Acid

2) The stronger the acid weaker is its conjugate base.

3) p[OH] = -log(OH-) = 4 ; pH + pOH = 14 So, pH = 14-4 =10

4) In neutralization eraction an acid reacts with base to form corresponding salt and water. This is the definition and practical phenomena of neutralization.

5) Lower the pH higer is the acidity and lesser the basicity. Hence correct order is

1,3,6,8,11,14

6) True, it resultasin the formation of more OH- ions

7) Al(OH)3 + HNO3 ==> Al(NO3)3 + H2O

hence salt is Al(NO3)3 [Note: Reactions is not stoichiometrically balanced and is for illustrative purpose only]

8) Chloric Acid

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