Grams to Moles Find the number of gramsof the substance. You will know from the problem how many grams and what the substance is, for example, 12 g of water. Find the molecular weight of each atom in the substance. The molecular weight is how much each molecule of the substance weighs ...
An Example to Calculate Molarity Consider a problem that asks for the molarity of a solution containing 100 grams (g) of sodium chloride, NaCl, in 2.5 liters of solution. First, determine the "formula weight" of NaCl by adding together the "atomic weights" of its elements, Na and Cl, ...
How many grams of CuSO_4.5H_2O is needed to prepare 10 mL of a 0.01 M solution? How many grams of CuCl2 are needed to prepare 470 mL of a 0.95 M solution of CuCl2? If you want to make 75 mL of a 0.015 M solution of B(OH)3 in water, how many gra...
Example 2: Suppose you must prepare 400 ml of a disinfectant that requires 1:8 dilution from a concentrated stock solution with water. Divide the volume needed by the dilution factor (400 ml / 8 = 50 ml) to determine the unit volume. The dilution is then done as 50 ml concentrated disi...
Please suggest a method I could use to determine this. How would you prepare 200 mL of a 12% (w/v) sucrose solution? Estimate the value of hydrogen peroxide as a bacteriostatic agent. How will you prepare 270 ml of a 20% sucrose solution (w/v), given that sucrose ha...
Calculate Molality: moles solute per kilogram solvent symbol: m m = moles / kilogram Example: What is the molality of a solution of 3 grams of KCl (potassium chloride) in 250 ml of water? First, determine how many moles are present in 3 grams of KCl. Start by looking up the number ...
You can only determine these experimentally or find a table of van't Hoff factors for a give concentration. Convert 20 g of NaCl to moles: 20 g * 1mole/58.44 g NaCl = moles NaCl Find Molality = moles NaCl / .1 liters of water ΔTFPD = 2kFPDm and TFP = 0 - ΔTFPD The thir...
volumetric properties: (a) calcite solubility, (b) muscovite solubility, and (c) wollastonite + quartz solubility; (a, b, c) in pure water at 2 kbar with varying temperature; (d) enstatite + forsterite solubility in NaCl solution of varying molality at 700°C and 4 kbar....
Titration is used to determine the concentration of an unknown substance via the molar relationship expressed through the chemical reaction equation. Using these relationships, the pH value can be determined by calculating the concentration of hydrogen i
Determine the moles of chemical contained in 1 liter (L) of the solution. Since molarity is the moles chemical per liter, this value will simply equal the molarity of the solution. For example, if you have a solution of potassium chloride (KCl) in water which is 2.50 molar, there are ...