Question

In: Chemistry

Will a precipitate of magnesium fluoride form when 200.0 ml of 1.9 x 10-3 M MgCl2...

Will a precipitate of magnesium fluoride form when 200.0 ml of 1.9 x 10^-3 M MgCl₂ are added to 300.0 ml of 1.4 x 10^-2 M NaF (K_sp (MgF₂ = 6.9 x 10^-9 )

Please explain, thanks!

Expert Solution

Answer – We are given, 200.0 ml of 1.9 x 10^-3 M MgCl₂ and 300.0 ml of 1.4 x 10^-2 M NaF, , K_sp MgF₂ = 6.9 x 10^-9

We know when we added the MgCl₂ and NaF there is formed MgF₂, so there is formed precipitation or not we need to calculate the Q_sp

We know expression for the Q_sp

Q_sp = [Mg²⁺][F^-]²

Now we need to calculate the[Mg²⁺] and [F^-] after mixing the solution.

Total volume = 200 +300 = 500 mL

Moles of MgCl₂ = moles of Mg²⁺ = 1.9 x 10^-3 M * 0.200 L

= 0.00038 moles

Moles of NaF = moles of F^- = 1.4 x 10^-2 M * 0.300 L

= 0.0042 moles

So, [Mg²⁺] = 0.00038 moles / 0.500 L

= 0.00076 M

[F^-] = 0.0042 moles / 0.500 L

= 0.0084 M

So, Q_sp = [Mg²⁺][F^-]²

= (0.00076) (0.0084)²

= 5.36*10^-8

So, Q_sp > K_sp and we know when Q_sp > K_sp then there is precipitation occurred, so magnesium fluoride will a precipitate

queen_honey_blossom answered 2 years ago

Will a precipitate form when of sodium iodide (1.76 x 10-3 M, 250.0 mL) is added...

Will a precipitate form when of sodium iodide (1.76 x 10-3 M, 250.0 mL) is added to 1.00 L of a 0.100 M solution of lead(II) nitrate? If so, how many grams of lead(II) nitrate remain in solution?Ksp of PbI2 = 9.8 x 10-9 NaI = 149.98 g/mol Pb(NO3)2 = 331.20 g/mol PbI2 = 461.01 g/mol

A solution contains 8.28×10-3 M magnesium nitrate and 1.47×10-2 M calcium acetate. Solid ammonium fluoride is...

A solution contains 8.28×10-3 M magnesium nitrate and 1.47×10-2 M calcium acetate. Solid ammonium fluoride is added slowly to this mixture. What is the concentration of calcium ion when magnesium ion begins to precipitate?

a) A beaker contains 200.0 mL of 0.250 M AgNO3. 200.0 mL of 0.100 M HCl(aq)...

a) A beaker contains 200.0 mL of 0.250 M AgNO3. 200.0 mL of 0.100 M HCl(aq) is added to it. What is the NO3− concentration in the final mixture?b) What is the Ag+(aq) concentration in the final mixture? (Hint: does anything happen when you mix these solutions?)

When 15.0 mL of a 7.02×10-4 M ammonium fluoride solution is combined with 22.0 mL of...

When 15.0 mL of a 7.02×10-4 M ammonium fluoride solution is combined with 22.0 mL of a 9.63×10-4 M magnesium sulfate solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to

A mixture is made by combining 14 mL of 1.9×10−3 M KSCN, 7.8 mL of 9.1×10−2...

A mixture is made by combining 14 mL of 1.9×10−3 M KSCN, 7.8 mL of 9.1×10−2 M Fe(NO3)3, and 11.7 mL of 0.475 M HNO3. Calculate the concentraion of Fe3+ in the solution.

When 15.0 mL of a 9.86×10-4 M magnesium sulfate solution is combined with 22.0 mL of...

When 15.0 mL of a 9.86×10-4 M magnesium sulfate solution is combined with 22.0 mL of a 6.62×10-4 M potassium carbonate solution does a precipitate form? yes (yes or no) For these conditions the Reaction Quotient, Q, is equal to

For PbCl2 (Ksp 2.4 x 10-4), will a precipitate of PbCl2 form when 0.10 L of...

For PbCl2 (Ksp 2.4 x 10-4), will a precipitate of PbCl2 form when 0.10 L of 3.0 x 10-2 M Pb(NO3)2 is added to 400 ml of 9.0 x 10-2 M NaCl? Please show, thanks!

1. When 15.0 mL of a 5.22×10-4 M magnesium iodide solution is combined with 18.0 mL...

1. When 15.0 mL of a 5.22×10-4 M magnesium iodide solution is combined with 18.0 mL of a 5.89×10-4 M ammonium fluoride solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to 1A. When 15.0 mL of a 4.09×10-4M potassium bromide solution is combined with 25.0 mL of a 1.59×10-4M silver nitrate solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to

Show with calculations whether a precipitate will form if: (a) 30.0 ml of 0.0024 M AgNO3...

Show with calculations whether a precipitate will form if: (a) 30.0 ml of 0.0024 M AgNO3 is mixed with 70.0 ml of 0.0036 M NaCl. (b) a solution that is 0.30 M with respect to HCl and 0.01 M with respect to Fe2+ is saturated with H2S (i.e. 0.10 M H2S). For FeS, Ksp = 3.7x10-19. Ksp for AgCl = 1.7x10-10.

Will a precipitate form if 100.0 mL of 2.5 × 10−3M Cd(NO3)2 and 75.0 mL of...

Will a precipitate form if 100.0 mL of 2.5 × 10−3M Cd(NO3)2 and 75.0 mL of 0.0500 M NaOH are mixed at 25°C? Calculate the concentration of cadmium ion in solution at equilibrium after the two solutions are mixed. (Ksp is 7.2 × 10−15 for Cd(OH)2 at 25°C)