Molarity & Solution Stoichiometry

What mass in (g) of AgBr is formed when 35.5 mL of 0.184 M AgNO₃ is treated with an excess of aqueous hydrobromic acid?

• 53.6
• 1.44
• 1.23
• 34.5

Tags

NGSS.HS-PS1-7

How many mL of 0.5M HNO₃ would be needed to react with 85mL of 0.75M KOH?

• 127.5mL

• 0.1275mL

• 31.9mL

• 0.031875mL

Tags

NGSS.HS-PS1-7

What would the molarity of the solution be if 0.475 mol of KNO₃ were formed in this reaction and the final volume of the solution was 595mL

• 0.798M

• 1.25M

• 282.6M

• 7.98x10^-4M

Molarity is:

• moles per liter of solution

• written with a unit of M

• calculated by dividing the moles of a substance by the liters of solvent

• all of the above

What mass of AgBr is formed when 35.5 mL of 0.184 M AgNO₃ is treated with an excess of aqueous hydrobromic acid?

• 53.6 g

• 1.44 g

• 1.23 g

• 34.5 g

Tags

NGSS.HS-PS1-7

Calcium carbonate reacts with aqueous hydrochloric acid to form calcium chloride solution, water, and carbon dioxide gas in the following equation: CaCO₃ (s) + 2 HCl --> CaCl₂ (aq) + H₂O (l) + CO₂ (g) What volume (in mL) of 1.35 M HCl will be needed to completely react with 3.82 g of solid CaCO₃?

• 56.5 mL

• 47.2 mL

• 61.6 mL

• 34.7 mL

• 124 mL

Tags

NGSS.HS-PS1-7

Solid iron (II) sulfide reacts with hydrochloric acid to form hydrogen sulfide gas and aqueous iron (II) chloride:

FeS (s) + 2 HCl (aq) --> H₂S (g) + FeCl₂ (aq) If 145 mL of HCl is needed to completely react with 25 g of iron (II) sulfide, what is the concentration of the HCl solution?

• 3.1 M

• 0.68 M

• 2.7 M

• 9.0M

• 3.9 M

Tags

NGSS.HS-PS1-7

18.26 mL of a 1.50M hydrochloric acid reacts with magnesium hydroxide. Calculate the mass of magnesium hydroxide needed for the reaction. 
  Mg(OH)₂  +  2 HCl  ->  2 H₂O + MgCl₂           

• 4.68 g Mg(OH)₂
• 0.789 g Mg(OH)₂
• 0.0274 Mg(OH)₂
• 1.07 g Mg(OH)₂

Tags

NGSS.HS-PS1-7

How many milliliters of 2.4 M H₃PO₄ solution are needed to react with 45 g Zn? (2 H₃PO₄ + 3 Zn --> Zn₃(PO₄)₂ + 3 H₂)

• 2400 mL

• 190 mL

• 290 mL

• 1700 mL

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

• 0.8 M

• 1.5M

• 3.0M

• 6.0M