chemistry

posted by .

Hi
Can sombody please help me with this problem
If a soil sample contains 0.5g of iron (Fe3+) per 100g. The iron is precipitated when soil becomes alkaline as shown by equation Fe3+ + 3OH + (x-1)H2O ? FeOOH.xH2O(s)
The soil is sprayed with 50 wt% urea solution with density of 1.21g/ml
equation follows (H2N)2CO + H2O ? CO2+ 2NH4+ + 20H-

1) How do you express the concentration of Fe3+ in the soil sample in mmol/g?
2) How do you calculate the mass and the volume of urea solution needed to precipitate all Fe3+ in the soil sample?

Thanks

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    An iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe2+(aq). The iron solution was titrated with 38.54 mL of 0.471 M Ce4+ solution according to the balanced chemical equation below. Ce4+(aq) + Fe2+(aq) …
  2. Chemistry

    A 0.1300 g iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe2+(aq). The iron solution was titrated with Ce4+ solution according to the balanced chemical reaction shown below. After calculation, it was …
  3. Chemistry problem

    Hi I'm stuck on these questions can you please help me A soil sample contains 0.2234 g of Fe3+ per 100g. Fe3+ is precipitated when the soil becomes alkaline as shown in the equation below. Fe3+ + 3OH- + (x-1)H2O „_ FeOOH.xH2O(s) …
  4. chemistry

    A 0.1943g iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe 2+ (aq). The iron solution was titrated with Ce 4+ solution according to the balanced chemical reaction shown below.After calculation, it …
  5. Chemistry

    A 0.5962g sample of iron ore is dissolved in acid producing Fe3+. Through a series of reactions, the iron precipitates as the Fe(OH)3. The precipitate is heated, forming solid Fe2O3. What is the mass % of iron in the sample if the …
  6. Chemistry

    A 0.5962g sample of iron ore is dissloved in acid producing Fe3+. Though a series of reactions, the iron precipitates as the Fe(OH)3. The precipitates is heated, forming solid Fe2O3. What is the mass % of iron in the sample if the …
  7. Chemistry

    Ground water intially contains 1.800mg/L of iron as Fe3+. What must the pH be raised to in order to precipitat all but 0.30mg/L of iron. The tempertaure is 25 degrees celcius
  8. chemistry

    A one thousand liter sample of water contains one gram of iron (III) ions. What is the concentration of Fe3+(aq) in parts per million?
  9. Analytical chemistry

    I did the next problem, i don't have the results for it and i just want to know if i calculated the mass for Fe2O3 the right?
  10. Chemistry

    A 0.020 M KMnO4 solution was used to determine the percent iron in a sample containing iron(II). MnO− 4 + 5 Fe2+ + 8 H+ → Mn+2 + 5 Fe3+ + 4 H2O It took 25.0 mL of the KMnO4 to completely react with all the iron(II) in the …

More Similar Questions