12.In the Determination of an lonie Compound experiment, why was water added to

Question

12.In the Determination of an lonie Compound experiment, why was water added to the crucible in the final steps? A. To decompose the magnesium nitride B. To make the crucible easier to clean C. To cool the crucible D. To form magnesium E. To decompose the magnesium oxide 13, Whnt is the enpiraide Mass of crucible and lid - 27.500 g Mass of crucible, lid and iron-28.058g Mass of crucible, lid and iron oxide 28.218 g A. Fe O B. Fe.O C. FeO D. FeO 14. What is the correct formula for Tin(II) Nitrate? A. Sn(NO B. Sn(NO C. TnNO D. Sn NO E. T(NO BaSo, 15. Name this compound using the nomenclature naming system: A. Barium Sulfate B. Barium(II) Sulfate C. Barium(II) Sufide D. Barium Sulfide E. Barium Sulfite For questions 16-17: In the Analysis of Silver, Mercury, and Lead experiment, a reaction of aqueous sodium chloride was mixed with aqueous lead(lI) nitrate; this reaction produced solid lead(lI) chloride and aqueous sodium nitrate. 16. What is the balanced overall equation for this reaction? C. 2 NaCl (ag) + D. 2 NaCl (ag) + E. 2 NaCl (ag)+ 2 PbNo, (ag) 2 PbC1@ + 2 NaNo, (ag) Pb(NO), (agi PbCls@ + 2 NaNO) (ag) PbNo, (ag) PbCl; (s) + 2 NaNO3(ag) 17. What is the balanced net ionic equation for this reaction? B. Pb. (ag) +2C1. (ag) PbCl fs) D. Pb); (ag) + 2 Cr (ag) PbCl2 (s)

Explanation / Answer

1. E

to decompose the MgO to Mg(OH)2, water is added

MgO + H2O ----> Mg(OH)2 + H2

2, Fe2O3

Mass of Iron or Fe = Mass of crussible + lid + Fe - mass of crussible + lid = 28.058 - 27.500 = 0.558 g

that is equal to molar mass of Fe

Mass of Iron oxide = Mass of crussible + lid + Iron oxide - mass of crussible + lid+Fe = 28.218 - 28.058 = 0.160 g

that is equal to molar mass of Fe2O3

3. B   Tin(II) Nitrate Sn(NO3)2

4.F Barium sulfite BaSO3

16 D

Pb(NO3)2 + 2 NaCl ========> PbCl2 + 2 NaNO3

17. D

Pb2+ + 2 Cl- ========> PbCl2

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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