Inorganic Chemistry Answers

When an excess of sodium sulfide was added to 125mL of 0.100mol/L iron 2 nitrate, a black precipitate formed. Identify the percipitate, and calculate the maximum mass of precipitate that can be collected from the reaction.

A sample of a substance known to contain chloride ion was dissolved in distilled water in a 1L volumetric flask. Then 25.00mL of this solution was reacted with excess silver nitrate. A precipitate of silver chloride was filtered and dried. The mass of the dry precipitate was 0.765g. What is the concentration of chloride ions?

How does PO4 3- ,phosphate bond with four oxygen atoms (one by double bond and three through by single bonds) when bonding with only two oxygen atoms (one through double bond and the other through single bond) can fulfills its octet? Is it not violating the octet rule?

What is understood by hydrogen bonding? How does hydrogen bonding? How does hydrogen bonding affect the properties of compounds? How many types of hydrogen bonding are there?

how many milliliters of 3.5M NaCl must be diluted to prepare 250ml of 0.45 M NaCl

If you have a solution of CaCl2 with a concentration of 0.30 M, what does it contain?
A.0.60 M Ca2+ ions and 0.60 M Cl- ions.
B.0.60 M Ca2+ ions and 0.30 M Cl- ions.
C.0.30 M Ca2+ ions and 0.60 M Cl- ions.
D.0.30 M Ca2+ ions and 0.30 M Cl- ions.
E.none of the above

When Cr2+ is linked with a strong–field ligand to produce an octahedral complex, the ion has two unpaired electrons. When it is linked with a weak–field ligand, the ion has four unpaired electrons. In contrast, the complex resulting from Cr3+ always has three unpaired electrons regardless of the nature of the ligand. Explain.

40g of molten iron (II) oxide react with 10g of magnesium according to the following equation:
FeO(l)+Mg(l)--> Fe(l)+MgO(s)
(A) what is the mass of iron produced?
(B) if the actual yield of Fe is 18.8g,calculate the percentage yield of this reaction.

Hydrochloric acid and magnesium carbonate react according to the following equation:
2HCL+MgCO3--> Mgcl2+H2O+CO2
(A) when 0.84g of MgCO3 reacts with excess HCL,what is the mass of MgCL2 that will be formed?
(B) if the amount of MgCL2 obtained is only 0.750g,calculate the percentage yield.

a one molar solution of HCl is about 92 percent ionized at room temperature .Calculate Ka for HCl.....(give me only solution no details.)