A color change indicates the pH endpoint. The unit expressing alkalinity is milligrams per liter (mg/l) of CaCO3(calcium carbonate). Measuring Alkalinity The U.S. Geological Survey (USGS) uses one common method for measuring alkalinity. It takes a water sample, adds acid, and then che...
I just want to confirm the correct weight of Epsom Salts needed for the 1l concentrate. In the Example above the calculations comes to 0.246g to get 100ppm. However, in the post before this it states that 2.45g is needed to obtain 1000ppm. Is the 2.45g right or should it be 2.46g?
What is the purpose of a titration curve? What unknown quantity can be calculated after a titration? What is an equivalent weight in analytical chemistry? What is conductometric titration in chemistry? What is method validation in analytical chemistry? Is analytical chemistry the same as quantitative...
In particular, it means that D is a function of the chloride concentration (and the exposure solution), and therefore equivalent to an apparent diffusion coefficient [135]. The importance of the coupling between the diffusivity of multiple ions is related to our discussion in Section 2 on the ...
What is the parts per million (ppm) concentration of the {eq}Mg^{2+}(aq) {/eq} cation in a 0.0250 M {eq}MgCl_2(aq) {/eq} solution? Magnesium Chloride: When magnesium chloride is dissolved in acetone, it becomes soluble. Magnesium chloride ha...
Chemists over the ages have adopted various units to quantify chemical substances, from the so-called 'gram-equivalent' (related to equivalent weight), to grams, and in certain contexts, moles. If a substance needs to be weighed out in a chemical laboratory, the technician will use a...
When we react two substances that are not of equivalent amounts, we can identify the limiting and excess reactants. For one, the limiting reactant would be the substance that inhibits the reaction since it has been already completely used up while the other is still...
A flame test is a qualitative test used to detect the presence of certain metal ions in a solution based on the characteristic color they emit during burning. These ions can be excited by heat and upon relaxation release energy with a specific color....