Zadania z chemii IB HL

In the Claus process, used to recover sulfur from refinery gases, sulfur dioxide reacts with hydrogen sulfide, $\ce{H2S}$, to form sulfur. (i) State the oxidation state of sulfur in $\ce{SO2}$ and in the sulfur produced. (ii) Deduce the balanced equation for…

Bromine is a diatomic element made up of two isotopes, $\ce{^{79}Br}$ and $\ce{^{81}Br}$, in an approximately 1 : 1 ratio. Which graph shows the full mass spectrum of bromine? A. Graph A B. Graph B C. Graph C D. Graph D

Using sections 1 and 2 of the data booklet, determine the amount of heat that the water in beaker B gained from the metal.

Assume that the heat released by the metal is equal to the heat absorbed by the water in beaker B, calculated in 2a. Determine the specific heat capacity of the metal. Use section 1 of the data booklet. If you have no answer to 2a, take the heat transferred to…

Using the table below, state the name of the metal from which the block is made. Metal Specific heat capacity / $\mathrm{J\,g^{-1}\,K^{-1}}$ Tin 0.228 Zinc 0.388 Titanium 0.523 Magnesium 1.02

Deduce, from the results obtained, two sources of systematic error in this procedure.

State one other physical property that could be measured to identify the metal while leaving the block intact.

Describe the bonding represented by the circle in structure A.

The ring in 4-methylstyrene is a benzene ring. State one chemical and one physical reason why structure A represents the benzene ring better than structure B.