Date ID: A ment or answers the question. 5. To prepare 0.250 L of 0.100 Maqucous

Question

Date ID: A ment or answers the question. 5. To prepare 0.250 L of 0.100 Maqucous NaCl (NaCl: 58.4 g/mol), onc may a. dissolve 0.100 g of NaCl n 250 ml. of water. b. dissolve 1.46 g of Naci in 250 mL of watcr. c. dissolve 0.100 g of Naci in enough water to make 0.250 kg of solution. d dissolve 1.46 g of NaCI in enough water to make 0.250 L of solution, e. dissolve 0.100 g NaCl in 0.250 kg of water. 6. If 25.00 mL of 6.00 M HCI is transtorred by pipet into a volumetric flask and diluted to 5.00 L what is the molarity of the diluted HCl? 0.0300 M 055 M 0.75 M d 43.0 M 20 x 7. What volume of 2.0 M NaCI is required to prepare 50 ml of 0.10 MNaCI? 7.5 mL 75 mL 3.0 L 8. What mass of Ca(NO)a (137 6 gmol) is present in a 291 g /.23 m ie a d is 4% HNO by mass and has a density

Explanation / Answer

Answer 5. (b) Dissolve 1.46 g of NaCl in 250 ml of water.

Answer 6. (a) 0.03 M ...

6 M * 25 ml = x M * 5000 ml

or, x = 0.03 M

Answer 7. (c) 7.5 ml ...

2 M * x ml = 0.1 M * 150 ml

or, x = 7.5 ml.

Answer 9. (e) 15.9 M ..... [70.4 * 1.42 g/ml * 63.01 g/mole] * 10 = 15.9

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