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11 Dec 2019

A solution is prepared by dissolving 1.04 g NaOH and 2.34 g Pb(NO3)2 in 1.42 L of water. Which of the following statements is correct? Ksp Pb(OH)2 = 1.4 x 10 - 20 Show work please.

A.An unsaturated solution is formed and no precipitate forms. B.A supersaturated solution is formed and a precipitate forms. C.A saturated solution is formed and a precipitate forms. D.A saturated solution is formed and no precipitate forms.

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Irving Heathcote
Irving HeathcoteLv2
13 Dec 2019

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Related questions

A lab technician adds 0.015 mol of KOH to 1.00 L of 0.001 M Ca(NO3)2. Ksp= 6.5x10^-6 for Ca(OH)2. Which of the following statements is correct?

- Calcium Hydroxide precipitates until solution is saturated.

- the solution is unsaturated and no precipitate forms

- the concentration of calcum ions is reduced by the addition of the hydroxide ions.

- one must know Ksp for calcium nitrate to make meaningful predictions.

- The presence of KOH will raise the solubility of Ca(NO3)2

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

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

b) BaCl2 + Na2SO4 Ã 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.


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