Zadania z chemii IB SL

A sample of flue gas has a volume of $2.5 \times 10^{-3}\ \mathrm{m^3}$ at 150 °C and $1.2 \times 10^5$ Pa, and contains 0.20 % $\ce{SO2}$ by volume. Using sections 1 and 2 of the data booklet, calculate the amount, in moles, of $\ce{SO2}$ present.

Sulfur dioxide can also be removed from flue gas by reaction with hydrogen peroxide, forming sulfuric acid. $\ce{SO2(g) + H2O2(aq) -> H2SO4(aq)}$ Deduce which element is reduced in this process, indicating the initial and final oxidation states. Element…

What is the number of subatomic particles in $\ce{^{88}Sr^2+}$? A. Protons: 40, neutrons: 50, electrons: 36 B. Protons: 38, neutrons: 50, electrons: 36 C. Protons: 38, neutrons: 88, electrons: 40 D. Protons: 40, neutrons: 88, electrons: 40

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.

Methanoic acid, $\ce{HCOOH(aq)}$, and hydrochloric acid, $\ce{HCl(aq)}$, are both acids. A $0.100\ \mathrm{mol\,dm^{-3}}$ solution of $\ce{HCOOH(aq)}$ has a pH of 2.39 while a solution of $\ce{HCl(aq)}$ of the same concentration has a pH of 1.00. (i) Explain…

(i) Oil of vitriol, spirit of hartshorn and wood alcohol are old trivial names still occasionally used for chemical substances, and names like these can be a source of confusion in international scientific communication. Outline how the modern system of naming…