Zadania z chemii IB SL

Using the concentration determined in 1c and the intended concentration of 0.1500 $\mathrm{mol\,dm^{-3}}$, calculate the percentage error in the concentration of the potassium hydroxide solution. If you have no value from 1c, take the concentration to be…

Explain why the potassium hydroxide solution has to be standardized before it is used in the titration. Assume that there are no systematic errors in the procedure.

(i) The boxes for the 1s and 2s orbitals of a sulfur atom are shown below. Draw the remaining orbitals needed for its ground-state electron configuration, filling and labelling each one. Use section 7 of the data booklet. (ii) For a sulfur atom, sketch the…

4.81 g of sulfur was heated in a stream of chlorine gas until the reaction was complete. The mass of the chloride produced was 10.13 g. (i) Calculate how many atoms are present in this 4.81 g sample of sulfur. Use sections 2 and 7 of the data booklet. (ii)…

Another hydride of sulfur is hydrogen sulfide, $\ce{H2S}$; it forms a sulfonium ion, $\ce{H3S+}$. State the types of bonds present in the sulfonium ion, $\ce{H3S+}$, and explain how these bonds are formed.

Sulfur forms a dichloride, $\ce{SCl2}$. Deduce the Lewis formula of $\ce{SCl2}$.

Titanium is not included in the graph. Use sections 9 and 10 of the data booklet to find its atomic radius and first ionization energy, and annotate the graph with a cross (X) at the position of the data point for titanium.

Suggest what causes the two quantities in the graph to be related in this way.

The data show that the first ionization energy and the atomic radius are related. (i) State what kind of relationship links the two variables. (ii) Compare and contrast the trends observed for the three groups.