why is it necessary to use previously boiled and cooled distilled water in the dilution of your unknown carbonate mixture?
can methyl orange be used as indicator if only NaOH is present in the sample?
we know that gases are soluble in liquids at a certain temperature only..if the liquid however is heated up to a certain point, then the ases dissolved in it would be removed through steam..therefore, distilled water is boiled in orde to remove the dissolved ases such as CO2 that would react with the carbonate ions. it is cooled but ensured to be covered so that the removed gases wont go back and re-dissolve.
To answer your first question, it is necessary to use previously boiled and cooled distilled water in the dilution of your unknown carbonate mixture to ensure that no impurities or contaminants are introduced to the solution. Boiling the distilled water helps to remove any volatile compounds that may be present. Cooling the water prevents any possible reactions or changes in concentration that could occur due to the heat. Using distilled water helps to maintain the integrity and accuracy of your results, as it is pure and free from any potential interfering substances.
Regarding your second question, methyl orange can be used as an indicator if only NaOH (sodium hydroxide) is present in the sample. Methyl orange is an acid-base indicator that changes color depending on the pH of the solution. In the presence of NaOH, which is a base, methyl orange will exhibit a color change. It will transition from its acidic form (red) to its basic form (yellow). This color change can be observed and used to determine the presence of NaOH in the sample. However, it's important to note that methyl orange is not suitable for all types of analyses and may not be the best indicator choice in some cases.