List the precautions to be taken to keep a balance functioning correctly.

Q: a sample of salt water was collected weighting 113.33g. After boiling for several minutes until dry,…

A: Given,  Weight of the sample of of salt water = 113.33 g  After boiling for several minutes until…

Q: What is precipitimetry?

A:

Q: Which produces an electrically conductive solution when dissolved in water? A) CaCl2    B) CCl4…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In…

A:

Q: Describe how to weigh hygroscopic solids

A: Answer - Hygroscopicity - Hygroscopicity is the tendency of a solid substance to absorb moisture…

Q: Which of the following statements is true?   After drying a sample in the oven, you can place it…

A: There are three types of substances or matter. These three types are solid, liquid and gas.…

Q: Most analytical machines used in science can either measure absorbance of light, like the…

A: Given: mg/L NO3- Absorbance 0 0 0.1 0.183 0.3 0.542 0.5 0.914 0.7 1.298 1 1.61

Q: Assignment: This is an individual activity. After studying the lesson and watching all the videos,…

A: 1.  a) Direct weighing means an objects is placed directly on balance and we take reading.…

Q: A pure crystalline "compound A" has a melting point 105-107 °C. If this compound i mixed with a…

A: Melting point is the temperature at which  solid changes its state to liquid at atmospheric pressure…

Q: (a) What is "Calcination" in Refractories? What is its purpose during the manufacture of…

A: Calcination is basically a purification process. It is the process of heating a solid at high…

Q: Tabulate the electrolytes in terms of their characteristics, clinical significance, specimen…

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Q: An oil sample had its iodine number determined using the pyridinium tribromide method. The sample…

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Q: What is the purpose of the laboratory exercise about simple distillation and fractional distillation

A: To refining the liquid through a separation process is known as distillation. The main purpose…

Q: After performing precipitation gravimetry, Asta placed the weighing form inside the crucible, heated…

A: The average of these masses is : 23.1136 + 23.2125 + 23.4120 + 23.11394 = 23.2130

Q: Explain the following briefly a.) Why is ‘‘distillation’’ a purifying technique? Cite evidences

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Q: is a method of purifying a compound by removing any 31. impurities that might be mixed with it. It…

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Q: Explain the reason why a laboratory analyst should not return excess or unused chemicals back in…

A: Excess reagents should not be returned to its original Reagent bottles because it might be…

Q: While filtering the crystals, the student used hot solvent to rinse the filter paper and the sample.…

A: The question is based on the variation of solubility any chemical entities with application of heat…

Q: During dilution process, what do you do if you add a bit too much solvent when filling the…

A: Volumetric flask is a lab equipment used to prepare solutions. It has a horizontal mark on its neck…

Q: Calculated Mass of NaCl= Pink in color and 0.781 grams in 125ml beaker Calculated Mass of DI H2O=…

A: As we know that, Calculated value =  experimental value So, calculated mass = experimental mass

Q: The weight of saturated NaCl was obtained by weighing the collected solid. Was this an accurate…

A: Mass percent is the mass of solute added in 100g of solution. mass percent = mass of solute mass of…

Q: Consider the steps involved in preparing a dilute solution from a stock solution. Arrange them in…

A: The dilute solution is prepared by using the stock solution of fixed volume which is then added with…

Q: A heterogeneous mixture Is the one which O has one phase O has a uniform composition throughout O…

A: The question is based on the concept of solutions . We have to identify which of the given…

Q: Which of the following statements is true? A After drying a sample in the oven, you can place it…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 10.00 mL of solution…

A: The dilution series is shown as follows:

Q: What hazards are involved in evaporating a solvent from a solution in a laboratory environment?

A: Solution is made up of two components: Solute and Solvent. Component which is present in major…

Q: Cosmetics and paints can be manufactured by method called formulation industry 1. Select one O True…

A: 1) Yes, Cosmetics and paints are manufactured by formulation. Hence the given statement is true.

Q: The diagram shows the apparatus for separating soil and water. What are the labeled parts? O A)A=…

A: Residue is the substance that left behind in the filter paper  Filtrate is the substance that get…

Q: Suppose you wish to separate a mixture of fine particles of gold and sand, neither of which is…

A: The aim is to separate silicon dioxide (sand) and gold from their mixture and a scheme for this…

Q: Derive Conversion of weight percent to atom percent..?

A: Atomic percentages is used when we look for the individual atoms from one species or another that…

Q: Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of…

A: Let us solve the question in a easy and efficient way. Given,  7 pieces of cylindrical beads…

Q: option y in the purification of crystals. g the solution after mixing. ng the crystals stallization…

A: Allow the solution cool down as slowly as possible, this will improve purity.Recrystallization also…

Q: Most analytical machines used in science can either measure absorbance of light, like the…

A: Concentration of unknown solution can be determined from the graph of concentration vs. Absorbance.

Q: What is an analytical balance?

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Q: Why is it important to always let hot objects cool before weighing? Convection currents that…

A: A plastic weigh boat or weighing paper may be damaged by a very hot sample. Usinh hot object…

Q: What is the theory behind recrystallization purifying a solid?

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Q: Calcium ions contribute to the hardness of water.  a) Based on the Ksp experiment, describe a way to…

A: Minerals of ions makes water hardness, Calcium and magnesium ions are the major reason for the…

Q: In each scenario, describe a step by step process in determining the unknown. Distilled water maybe…

A: When a substance is prone to absorption of moisture on exposure to the environment, then it is…

Q: a balanced equatior

A:

Q: Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of…

A:

Q: What are the functions of the graduated cylinder and distillate in a distillation set-up?

A: In the process of distillation, generally we separate the liquid from non volatile solid heating at…

Q: lassify and Balance: C8H18 (g) + O2(g) --> C02 (g) + H2O (g) our answer D This is a required…

A: Classifying the given reaction as follows.

Q: What are the areas of improvement for simple distillation and refluxing?

A: A question about method of purification, which is to be accomplished.

Q: rue/False dicate whether the statement is true or false. Write T if the statement is true while F if…

A: 16. When the sample requirement is large  it is actually imposible to work with it without prior…

Q: Complete the table and provide the percent (%) recovery for each extraction

A: A question based on general chemistry that is to be accomplished.

Q: please highlight the correct answer

A: The graph between absorbance and [NO3-] is given below in which the concentration of 1 mg/L is not…

Q: e weight percent

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…