If 100 mL of 3.0 M solution were diluted to 250 mL, what would the concentration

Question

If 100 mL of 3.0 M solution were diluted to 250 mL, what would the concentration be? a. 0.012 M b. 0.12 M c. 1.2 M d. 12 M e, 120 M Which one of the following statements regarding a strong is not correct? a. acid A strong acid ionizes completely in water. b. A strong acid ionizes in water to produce hydronium ions. c. A strong acid neutralizes bases. d. HCl is an example. e. A strong acid is highly concentrated. Identify the acid in the following acid-base reaction. a. PbCO_3 (s) b. CO_2(g) c. PbSO_4(s) d. H_2O(t) e. H_2SO_4(aq) If one regular antacid tablet contains 500 mg of solid CaCO_3 (100 g/mol), how many mL of 1.0 M stomach acid (HCl) could it neutralize? a. 5 mL d. 100 mL c. 50 mL b. 10 mL e. 15 mL If 1.0 L of 1.0 M HCl spilled and needed to be neutralized, how many grams of the solid sodium carbonate (Na_2CO_3, 106 g/mol) would be required? a. 53 g b. 106 g c. 1060 g d. 530 g e. 212 g

Explanation / Answer

Quesiton 17.

V1 = 100 mL, M1 = 3 M

V2 = 250 mL, M2 = ?

apply Dilution law

which states that

M1*V1 = M2*V2

so

M2 = M1*V1/V2

M2 = 100/250*3

M2 = 1.2 M

best answer is C

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