The 10 leading causes of death in the world, 2000 and 2012. Ischaemic heart disease, stroke, lower respiratory infections and chronic obstructive lung disease have remained the top major killers during the past decade. HIV deaths decreased slightly from 1.7 million (3.2%) deaths in 2000 to 1.5 million (2.7%) deaths in 2012. Diarrhoea is no longer among the 5 leading causes of death, but is still among the top 10, killing 1.5 million people in 2012. Chronic diseases cause increasing numbers of deaths worldwide.
pH. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.The letters pH stand for power of hydrogen and the numerical value is defined as the negative base 10 logarithm of the molar concentration of hydrogen ions.xamples of pH Values. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
A pH scale is a measurement system used to indicate the concentration of hydrogen ions in solution; ranges from 0 to 14. In other words, the pH scale shows the acidity or basiâ¦city of a substance. 7 is when the pH of something becomes neutral, for instance, water.