8 A small quantity of hydrochloric acid was added toa large quantity of marble chips in an evaporatingdish, which was placed on the pan of a balance. Themass of the dish and its contents was recordedhalf minute. The results are shown in theeverygraph below.25.125.024.924.8-24.7-24.6+0.:::3.4.Time / minutesa Explain why the curve slopes down.b Which result would seem to be incorrect? Why?What was the mass of the evaporating dish andits contents (i) at the start and (ii) at the end ofthe experiment?d What mass of carbon dioxide was produced?e How long did the reaction last?f During which of these times in the experimentwas the rate of reaction most rapid:0-min?g Make a copy of the graph. On your copy, sketchthe1-1 min?3- 3 min?curve youchilled.would expect if the acid had first beenh Now sketch the curve you would expect if thechips had first been crushed to powder.iWhat apparatus could be used instead of anevaporating dish, to prevent any loss of acid bysplashing?Mass of dish and contents/ grams

As per the rule only three sub parts can be answered.

8 A small quantity of hydrochloric acid was added to a large quantity of marble chips in an evaporating dish, which was placed on the pan of a balance. The mass of the dish and its contents was recorded every half minute. The results are shown in the graph below. 25.1 25.0 24.9 24.8 24.7- 24.6+ 0. 1 3 4 Time / minutes a Explain why the curve slopes down. b Which result would seem to be incorect? Why? What was the mass of the evaporating dish and its contents (i) at the start and (ii) at the end of the experiment? Mass of dish and contents/ grams

8 A small quantity of hydrochloric acid was added to a large quantity of marble chips in an evaporating dish, which was placed on the pan of a balance. The mass of the dish and its contents was recorded every half minute. The results are shown in the graph below. 25.1 25.0 24.9 24.8 24.7- 24.6+ 0. 1 3 4 Time / minutes a Explain why the curve slopes down. b Which result would seem to be incorect? Why? What was the mass of the evaporating dish and its contents (i) at the start and (ii) at the end of the experiment? Mass of dish and contents/ grams

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.16QAP

See similar textbooks

Similar questions

Medicare does not cover the cost of this prescription medicine, which currently averages $297.78 per kilogram. The theoretical yield for the pure barium sulfate you were transferring was 500.00kg. You spilled 27.45 kg. What is the % yield of the transfer that you need to report? And also determine the consumer price of the spilled barium sulfate.
6. One teaspoon of sertraline 20 mg/mL must be mixed into eight fluid ounces of water before consuming. Express the final concentration of sertraline when mixed with water as a ratio strength (w/v). Rounddenominator of ratio strength (w/v) to the nearest whole number.
COMPLETE SOLUTION with given and required ASAP You will be defining a new temperature scale in oX, in which the freezing and boiling points of water areone-hundred degrees X and one-thousand fifty-five oX, respectively. Correlate this to Celsius orFahrenheit scales. The oX reading on this scale is a certain number of degrees on a correspondingabsolute temperature scale. What is the corresponding absolute temperature at 0oX?
A mixture of ethanol (ethyl alcohol) and water contains 40.0% water by mass.(a) Assuming volume additivity of the components, estimate the specific gravity of themixture at 20°C. What volume (in liters) of this mixture is required to provide 150 mol ofethanol?(b) Repeat Part (a) with the additional information that the specific gravity of the mixture at20°C is 0.89045 (making it unnecessary to assume volume additivity). What percentage errorresults from the volume-additivity assumption?
In a river with a constant flow rate, the factory releases wastewater containing NaCl at a concentration of 200 mmol / L to the river at 20.0 L / s. The Na+ and Cl- concentrations at the downstream observation point were 1.00 mmol / L and 0.800 mmol / L, respectively. What is the river flow Q and Cl- concentration before the inflow of drainage? The river originally contains 0.500 mmol / L of Na+.
For the standard equation, shouldn't it be (0.97-1.09) and so on... because (x-mean)
If 35,000 kg of whole milk containing 4% fat is to be separated in a 6-hour period into skim milk with 0.45% fat and cream with 45% fat, what are the mass flow rates of the two output streams from a continuous centrifuge which accomplishes this separation? (Ans; Cream=464.8335kg/h, Skim milk= 5368.4998kg/h)
A physician orders isotonic sodium lactate 5 mL/kg body mass to be delivered by IV for a 164-lb patient with severe acidosis. The IV tubing delivers at the rate of 20 drops/mL and set for a flow rate of 15 drops/min. How long should the IV be set to run for this patient?
A stock solution of 75% v/v ethanol was diluted with distilled water to prepare 1L of 42% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol). Determine the initial volume (in mL) of 75% v/v ethanol used in the preparation. Final answer should NOT contain any unit. Type the VALUE only. Please observe 0 decimal places.
A partially filled one-gallon [gal] pitcher, that has a mass of 0.35 kilograms [kg] when empty, is sitting on a kitchen counter. Assume the total mass of the pitcher and its contents is 2 kilograms [kg]. The pitcher contains a liquid that has a molecular weight of 19.5 grams per mole [(g)/(mol)] and a molarity of 57 moles per liter [(mol)/(L)]. (a) Determine the volume of the liquid in the pitcher in units of liters [L]. (b) Determine the specific gravity of the liquid in the pitcher.
A study is being performed to see if there is a correlation between the concentration of chromium in the blood and a suspected disease. Blood samples from a group of volunteers with history of the disease are analyzed and compared with the results from the healthy control subjects. From the following results (Table 1), determine whether the differences between the two groups can be ascribed as chance or whether they are real at 95% confident level.
A 5.00 wt% sulfuric acid solution in water has a density of 1.03 g/mL and is flowing through a 45-meter long pipe that has a 6.0 cm diameter at a rate of 82 liters per minute. The average velocity of a fluid in a pipe equals the volumetric flow rate divided by the cross-sectional area normal to the direction of flow. How long in seconds does it take the solution to flow through the 45-meter long pipe?