Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical formula in the last column. solution A manganese(11) bromide iron(II) sulfate ammonium nitrate solution B cadmium nitrate potassium hydroxide sodium chloride Does a precipitate form when A and B are mixed? O yes no yes no yes no empirical formula of precipitate 0 0 0 0° 0. X

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1. Preparing of oxalate solution: Mass of full cap = 20,7175, empty = 20,5490 g. Volumens of the Solution is 50 mL

To prepare 50 mL solutions of 0.01 M KMnO4 in water (calculation to prepare chemicals in spectrophotometer)

The dictionary defines homogeneousas “uniform in compo-sition throughout.” River water is a mixture of dissolved com-pounds, such as calcium bicarbonate, and suspended soil particles. Is river water homogeneous? Explain

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Sodium hydroxide solution was standardized against one gram of potassium phthalate. First trial used 52.0 ml of the solution while the second trial used 52.4 of the solution to reach the end point. (a) What is the standardized concentration of the solution? (b) If the task is to prepare a one tenth of a molar solution, what is the percent accuracy of the preparation? The standardized basic solution was then used in getting the total acidity of a food sample. Ten milliliter of the acidic sample consumed 10.3mL in the first trial then 10.0mL in the second trial to reach endpoint. (c) What is the normality of the acidic sample? Compute the total acidity of the food sample assuming that ten grams of sample was dissolved to 25ml of solution if the sample is: (d) Milk (MW, lactic acid =90) (e) Juice (MW, citric acid = 192.4; one mole citric acid reacts with three moles NaOH) (f) Vinegar (MW, acetic acid = 60) If you are a food safety inspector, would the sample pass if (include reason) (g)…

The following evidence was obtained from an experiment to determine the molar concentration of a sodium nitrate solution. A sample of sodium nitrate solution was evaporated to dryness and the mass of solid residue was measured.Evidence:Volume of solution = 10.00 mLMass of beaker = 79.54 gMass of beaker and residue = 82.96 gFrom this data, calculate the molar concentration of the original sodium nitrate solution. Record only your numerical answer with the correct number of significant digits.  You do not need to include units as the units appear for you beside the answer box already.

Masses :  Ca = 40.08 g   S= 32.07 g  O= 16.00 g  A 35.0 mL sample of CaSO4 was evaporated to dryness, leaving 0.967 g of residue. What was the molarity of the original solution?   step by step please

10. An element has two isotopes of relative atomic masses 41.0 u and 44.0 u. The relative abundance of the isotopes are 90.0% and 10.0% respectively. The average atomic mass of the element is: (A) 41.0u (B) 41.3u (C) 42.5u (D) 43.7u 2 11. Which of the following phrases best describes the term solubility? (A) the ability of a solvent to dissolve in a solute (B) the ability of a solute to dissolve in a solvent (C) the maximum amount of solute that will dissolve in solvent at a given temperature (D) the maximum amount of solvent that will dissolve in a solute at a given temperature 4