Question

can you please do 1,2,3 and 4

SectoA! CICIL UI (0 ) 1. In water, the acid that dissociates partially in water as ions (1% to 2%) in solution is a: a) weak electrolyte b) nonconductor c) strong electrolyte d) nonelectrolyte 2 According to the Arrhenius theory, if KOH and Ba(OH)2 and were separately dissolved in water, each would act as: a) a base and an acid respectively b) an acid and an acid respectively c) a base and a base respectively d)an acid and a base respectively 3 Which solution of a base contains the largest number of moles of a base? a) 0.50 L of 4.0 M b) 5.0 L of 4.0 M c) 4.0 L of 0.40 M d) 0.50 L of 0.40 M 4 If 0.500 L of a 3.50 M HCl acid is diluted to 1.00 L, the molarity of the new solution is: a) 1.50 M b) 1.75 M €) 1.40 M d) 3.50 M o tor 5 Which of the following is correctly identified a) NH, is a strong acid b) Ca(OH)2 is a weak base c) HCIO, is a strong acid d) H.CO, is a strong acid 6 The Following reaction is classified as: Boa nod oogolla K2CO3(aq)+BaCl(aq) → BaCO3(s)+2Kcla r s a) acid-base neutralization reaction c) single replacement reaction b) precipitation reaction d) oxidation-reduction reaction 7 Which one of the following is a weak acid in aqueous solution? a) CHCOOH b) HNO) c) NHẠ d) KOH

Answer 1

1) Answer is b). Since very few ions are present thus it is non-conducting.

2) Answer is c). Both will release OH- ions hence act as base according to Arrhenius concept.

3)Answer is b). Moles = 5×4 = 20 moles

4) Answer is b)

Molarity = M1V1/V2 = 0.500×3.5/2 = 1.75

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