Inorganic Chemistry Answers

200cm^3 of 0.2mol/dm^3 lead trioxoxnitrate(5) are mixed with 200cm^3 of 0.2mol/dm^3 sodium chloride. Calculate the volume of excess reagent. The mass of lead(2) chloride formed.

When 14g of an impure sample of iron was dissolved in 300cm^3 of HCL solution the mass of hydrogen produced was 0.4g calculate the percentage purity of the iron. The mass of FeCl2 formed and the concentration of HCL used.

how many sodium ions are present in 400cm3 of 0.5mol/dm^3 of sodium trioxocarbonate 5 solution

What is the molality of a 10% w/v NaCl solution used in the qualitative determination of tannins in plants? (MW NaCl: 58.5 g/mol)

b)  Answer the following stoichiometry questions by referring to the equation below:

2       

KClO₃               2 KCl + 3 O₂

i.        If 1.50 mol of KClO₃ decomposes, what is the mass of O₂ that will be produced? 

The rate constant the for the reactions below is presented in the table. It an interchange mechanism. Based on the data below which do you think is 𝐼𝑑 and which might be 𝐼𝑎. Give reason(s) for your answers. (𝑈𝑛𝑖𝑡 𝑜𝑓 𝑡h𝑒 𝑟𝑎𝑡𝑒 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡 𝑘 𝑖𝑠 𝑠−1)

[M(H2O)6]n + Y → [M(H2O)5 Y]n+ + H2O 𝑀 = 𝑁𝑖2+ 𝑎𝑛𝑑 𝑃𝑏2+

CH CO− F− NH SCN- 323

𝑁𝑖2+ 3x104 8x103 3x104 6x103 𝑃𝑑2+ 2x106 3x102 7x102 3x108

1. Why a solid has a definite shape but a liquid does not.

2. Why negative ions are larger then their atoms

Calculate the pressure exerted by 0.0153 moles of CO2 gas in

a container of 1.467 L at 20.0 C.

What was added to 50.0g of NaCl to produce 100cm3 of a saturated solution at 25C?

Iron (III) chloride reacts with magnesium oxide. If 13.75 g of iron (III) chloride reacts with magnesium oxide to form 5.25 g of the magnesium product, what is the percent yield?