Question

1x10ⓇM B 2x10 M 40 Normal gastric juice has a pH of about 2 and the gastric in is the concentration of HCl in the stomach? U10 M D 3x10 M of about 2 and the gastric juice is aqueous HCI. What 2 M HCI B 1.0x10' M HCI C 0.01 M HCI D 0.14 M HCI Ques. to, 41 Question What is the [H30'] of a sweat sample that has a pH = 5.8? A 2x10mm B3X10ⓇM 3x107M 42 The pH of a lime is 1.90. What is the [H30']? D 3x108M A 1.3 * 10-²M B 7.9 x 10-4 M C [H30'] =1.9 M D 7.9 x 10-1M 43 ... is a solution whose pH changes very little, when acid or base is added to it? A Hypotonic B Hypertonic c Buffer D Amphoteric 44 Most buffers are solutions composed of approximately equal amount of ------? all of these and Weak acid and the Strong acid and d Weak acid and B strong base salt of its conjugate weak base base Which of the following substances is a buffer solution 45 A HBr and NaBr BHF and KF CH,COOH alone DHCl and Naci 46 Which buffer solution has the lowest pH (HF has Ka = 7.2 x 10 )? 0.10 M HF and 0.10 M NaF 0.20 M HF and l d 0.20 M HF and 0.10 M NaF 190.20 M NaF D 0.10 M HF and 0.0 M NaF

Answer 1

40 Loe knouo H=10 Sine Helis a Ste aiicid PH (A 10 42 He 1010 1-26X10 M A) O.0426 M L4 4B (44 pew