A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions (H3O+) or hydrogen ions (H+) in the Arrhenius model. Normally, the indicator causes the color of the solution to change depending on the pH. Indicators can also show change in other physical properties; for example, olfactory indicators show change in their odor. The pH value of a neutral solution is 7.0.
Primary research consists of a collection of original primary data collected by the researcher.It is often undertaken after the researcher has gained some insight into the issue by reviewing secondary research or by analyzing previously collected primary data.he term primary research is widely used in academic research, market research and competitive intelligence. There are advantages and disadvantages to primary research. Advantages: 1  Researcher can focus on both qualitative and quantitative issues.
the difference between secondary and primary market research are you starting a new business expanding an existing business introducing a new product line or entering a new geographic market in all of these situations market research can help you make better decisions and improve your chances of success there are two types of market research secondary market research and primary market research here s a closer look at the difference between the two secondary research is based on information from studies previously performed by government agencies chambers of commerce trade associations and other organizations