. Balance the following reactions then tell which are metathesis (double replace

Question

. Balance the following reactions then tell which are metathesis (double replacement) reactions:

                a) CaCO3 + 2HNO3 à Ca(NO3)2 + CO2 + H2O

                b) BaCl2 + Na2SO4 à BaSO4 + NaCl

                c) Pb(NO3)2 + HCl à PbCl2 + HNO3

                d) AgNO3 + Zn à Zn(NO3)2 + Ag

3. A solution was prepared by dissolving 1.564 g of NaCl and 2.765 g of KCl in some water and diluting to exactly 250 mL in a graduated flask. What is the molarity of Na+, K+ and Cl- ions in the solution?

4. Suppose you have a solution that might contain Al3+, Ca2+, Ag+, and Zn2+ ions. Addition of HCl gave a white precipitate. After filtering off the precipitate, potassium sulfate was added to the filtrate resulting in a white precipitate, which was again filtered off. When a large amount of KOH was added to the filtrate, no precipitate was formed. Which cations are present in the solution?

I need help with those three questions please.

Explanation / Answer

Balancing related question

a) CaCO3+2 HNO3=Ca(NO3)2+CO2+H2O

It's a double decomposition ie metathesis reaction.

b) BaCl2+Na2SO4=BaSO4+2 NaCl

It's a double decomposition reaction.

c) Pb(NO3)2+2 HCl=PbCl2+ 2 HNO3

It's double decomposition

d) 2 AgNO3+Zn=Zn(NO3)2+ 2Ag

It's not a double decomposition reaction, rather it's a single displacement reaction.

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.