The Na2S that we are using for this lab is a hydrated solid. That is, there...
The Na2S that we are using for this lab is a hydrated solid. That is, there are water molecules absorbed within the solid itself. You will be using 60% Na2S; 60% of the mass of this solid is Na2S and the other 40% is water. For example, if you have a 10 gram sample of Na2S (60%), 6 grams is Na2S and 4 grams is H2O.
a. You will be using 0.1 gram quantities of Na2S (60%) in this lab. In grams, how much of this sample is Na2S?
b. Using your answer to part a, calculate how many moles of Na2S are in a 0.1 gram sample of Na2S (60%).
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The Na2S that we are using for this lab is a hydrated solid.
That is, there...
1. The Na2S that we are using for this lab is a hydrated solid. That is,...
1. The Na2S that we are using for this lab is a hydrated solid. That is, there are water molecules absorbed within the solid itself. You will be using 60% Na S; 60% of the mass of this solid is Na2S and the other 40% is water. For example, if you have a 10 gram sample of Na S (60%), 6 grams is Na2S and 4 grams is H,O. a. You will be using 0.1 gram quantities of NazS (60%)...
A student heated a sample of a hydrated salt and obtained the following data: Grams of...
A student heated a sample of a hydrated salt and obtained the following data: Grams of hydrated salt used: 1.0000 gram Grams of anhydrous salt (147 g/mole) recovered: 0.8033 grams Grams of water vapour (18 g/mole) lost: 0.1967 grams Determine the percentage by mass of water in this hydrate. (1) How many water molecules, "X", are bonded to this hydrated salt, salt. X H20? (2)
DATA ANALYSIS 3. Some salts, when they form, may trap water are referred to as hydrated...
DATA ANALYSIS 3. Some salts, when they form, may trap water are referred to as hydrated salts. The structure. This is referred to as an anhydrous sait. of water molecules per unit of salt (e.g. xg H, per When heated, the water can be drivent from the salt it results in the anhydrous form of that sa chloride. In its anhydrous form the formula for form the formula for cobalt chloride is CoCl2 XH2O per given unit of salt. If...
18. A student performed the same experiment you did in the lab to find the chemical...
18. A student performed the same experiment you did in the lab to find the chemical formula of a copper chloride hydrate with the general formula Cu,Cl,.2H20. Water molecules evaporated when the solid was heated until it turned brown then the sample was dissolved in water to react with a coil of aluminum wire and copper deposited on the coil. The student weight the initial material in a beaker before and after drying, and weight the deposited dried copper powder...
91 Experiment THE TEMPERATURE DEPENDENCE OF THE SOLUBILITY OF A SALT IN WATER The Pre Lab...
91 Experiment THE TEMPERATURE DEPENDENCE OF THE SOLUBILITY OF A SALT IN WATER The Pre Lab 1. Referring to the solubility graph for KCIO, given earlier in the experiment, indicate whether at 60 °C a solution of 20 grams of KCIO, in 100 grams of water is saturated unsaturated supersaturated solution About how much KCIO, would dissolve in 38 grams of water at 70 °C? Data is shown where the saturation temperature has been found for dissolving 6.5 g of...
In the laboratory you are asked to make a 0.264 m sodium sulfide solution using 525...
In the laboratory you are asked to make a 0.264 m sodium sulfide solution using 525 grams of water. How many grams of sodium sulfide should you add? grams. I'm having a hard understanding which formula to uses in this question. molality vs Molarity I known that the molar mass of Na2S= 78.05 and that H20= 18.02 We are given 0.0264 mol of Na2s which is the concentration, which is what I am guessing in a mixed solution of 525...
As part of Lab 11 you will make and standardize a solution of NaOH(aq). Suppose in the lab you measure the solid NaOH an...
As part of Lab 11 you will make and standardize a solution of NaOH(aq). Suppose in the lab you measure the solid NaOH and dissolve it into 100.0 mL of water. You then measure 0.1993 g of KHP (204.22 g/mol) and place it in a clean, dry 100-mL beaker, and then dissolve the KHP in about 25 mL of water and add a couple of drops of phenolphthalein indicator. You titrate this with your NaOH(aq) solution and find that the...
Lab 8. Data Sheet: Gram - Mole - Particle Conversion Name: Instructor Date: Time & Day...
Lab 8. Data Sheet: Gram - Mole - Particle Conversion Name: Instructor Date: Time & Day of lecture: Do the setups and write you answer with the correct significant digits in the spaces below. 1. Mass of gold in grams 845 grams a. mass in kg b. number of moles c. number of atoms 2. Mass of silver in grams 54.2 grams a. mass in kg b. number of moles c. number of atoms 298 5 grams 3. Mass of...
Please complete the lab report Please Danate EXPERIMENT 6 ther Water in Hydrates MATERIALS AND EQUIPMENT...
Please complete the lab report
Please Danate EXPERIMENT 6 ther Water in Hydrates MATERIALS AND EQUIPMENT Golids: finely ground eopper I) sulfate pentahydrate (Cuso, 5H,0), and unknown hydrate Cobalt chloride test paper, clay triangle, erucible and cover, 25x 200 mm ignition test tube, watch glass DISCUSSION any salts form compounds in which a definite number of moles of water are combined with each mole of the anhydrous salt. Such compounds are called hydrates. The water which is ther two ane...
i need help with questions A-E please The Mole Concept: Chemical Formula of a Hydrate- Lab...
i need help with questions A-E please
The Mole Concept: Chemical Formula of a Hydrate- Lab Report Assistant Exercise 1: Water of Hydration Data Table 1. Alum Data. Object Mass (g) Aluminum Cup (Empty) 3 Aluminum Cup +2.00 grams of Alum5 Aluminum Cup + Alum After 1 Heating 4.44 Aluminum Cup + Alum After 2 Heating 3.52 Mass of Released HO 1.48 Molecular Mass of H,0 18.015 Moles of Released H,0 OU54 Questions: A) Calculate the moles of anhydrous (dry)...
1. The Na2S that we are using for this lab is a hydrated solid. That is, there are water molecules absorbed within the solid itself. You will be using 60% Na S; 60% of the mass of this solid is Na2S and the other 40% is water. For example, if you have a 10 gram sample of Na S (60%), 6 grams is Na2S and 4 grams is H,O. a. You will be using 0.1 gram quantities of NazS (60%)...
A student heated a sample of a hydrated salt and obtained the following data: Grams of hydrated salt used: 1.0000 gram Grams of anhydrous salt (147 g/mole) recovered: 0.8033 grams Grams of water vapour (18 g/mole) lost: 0.1967 grams Determine the percentage by mass of water in this hydrate. (1) How many water molecules, "X", are bonded to this hydrated salt, salt. X H20? (2)
DATA ANALYSIS 3. Some salts, when they form, may trap water are referred to as hydrated salts. The structure. This is referred to as an anhydrous sait. of water molecules per unit of salt (e.g. xg H, per When heated, the water can be drivent from the salt it results in the anhydrous form of that sa chloride. In its anhydrous form the formula for form the formula for cobalt chloride is CoCl2 XH2O per given unit of salt. If...
18. A student performed the same experiment you did in the lab to find the chemical formula of a copper chloride hydrate with the general formula Cu,Cl,.2H20. Water molecules evaporated when the solid was heated until it turned brown then the sample was dissolved in water to react with a coil of aluminum wire and copper deposited on the coil. The student weight the initial material in a beaker before and after drying, and weight the deposited dried copper powder...
91 Experiment THE TEMPERATURE DEPENDENCE OF THE SOLUBILITY OF A SALT IN WATER The Pre Lab 1. Referring to the solubility graph for KCIO, given earlier in the experiment, indicate whether at 60 °C a solution of 20 grams of KCIO, in 100 grams of water is saturated unsaturated supersaturated solution About how much KCIO, would dissolve in 38 grams of water at 70 °C? Data is shown where the saturation temperature has been found for dissolving 6.5 g of...
Lab 8. Data Sheet: Gram - Mole - Particle Conversion Name: Instructor Date: Time & Day of lecture: Do the setups and write you answer with the correct significant digits in the spaces below. 1. Mass of gold in grams 845 grams a. mass in kg b. number of moles c. number of atoms 2. Mass of silver in grams 54.2 grams a. mass in kg b. number of moles c. number of atoms 298 5 grams 3. Mass of...
Please complete the lab report
Please Danate EXPERIMENT 6 ther Water in Hydrates MATERIALS AND EQUIPMENT Golids: finely ground eopper I) sulfate pentahydrate (Cuso, 5H,0), and unknown hydrate Cobalt chloride test paper, clay triangle, erucible and cover, 25x 200 mm ignition test tube, watch glass DISCUSSION any salts form compounds in which a definite number of moles of water are combined with each mole of the anhydrous salt. Such compounds are called hydrates. The water which is ther two ane...
i need help with questions A-E please
The Mole Concept: Chemical Formula of a Hydrate- Lab Report Assistant Exercise 1: Water of Hydration Data Table 1. Alum Data. Object Mass (g) Aluminum Cup (Empty) 3 Aluminum Cup +2.00 grams of Alum5 Aluminum Cup + Alum After 1 Heating 4.44 Aluminum Cup + Alum After 2 Heating 3.52 Mass of Released HO 1.48 Molecular Mass of H,0 18.015 Moles of Released H,0 OU54 Questions: A) Calculate the moles of anhydrous (dry)...
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