Question

QUESTION 1 43.2 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 36.1 mL of 0.415 M NaCl. The equation for the precipitate reaction is: Pb(NO3)2 (aq) + 2 NaCl (aq) --> PbCl2 (s) + 2 NaNO3 (aq) How many moles of PbCl2 are formed? (with correct sig figs)

QUESTION 2 What volume (in mL!!!) of 1.28 M HCl is required to react with 3.33 g of zinc (65.41 g/mol) according to the following reaction? Zn(s) + 2 HCl (aq) → ZnCl2(aq) + H2(g) (with correct sig figs)

QUESTION 3 Assuming volumes are additive, how much water (in mL) should be added to 29.5 mL of a 1.77 M solution of hydrochloric acid (HCl) to produce a 0.100 M solution?(with correct sig figs)

QUESTION 4 What is the concentration of fluoride ions (in M) in a 7.95 M solution of cobalt(III) fluoride: CoF_{3 (With correct sig figs)}

QUESTION 5 What is the concentration (in M) of a calcium nitrate (Ca(NO₃)₂ 164.10 g/mol) solution prepared by dissolving 14.5 g of Ca(NO₃)₂ (164.10 g/mol) in enough water to produce 393 mL of solution? (Do not drop significant digits.)

Answer 1