On the axes below, sketch the graphs which show the result of adding: 0.1M NaOH to 25cm3 of 0.1M ethanoic acid. 0.1M NaOH to 25cm3 of 0.1M H2SO4
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On the axes below, sketch the graphs which show the result of adding:
- 0.1M NaOH to 25cm3 of 0.1M ethanoic acid.
- 0.1M NaOH to 25cm3 of 0.1M H2SO4
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- 50 Percentage Red No. 40 Soln 100% 80% 60% 40% Table 4.1: Dilutions of Red No. 40 & Absorbance Volume of Red No. 40 Soln (mL) 10me 8mL опи 4mL Percentage Red No. 40 Soln 100% 80% 60% 40% 20% Volume of DI Water (mL) OML 2mL LIML M UML 8ML Table 4.2: Dilutions of Red No. 40 & Absorbance Concentration Red No. 40 2. Report the wavelength with the maximum absorbance of Red No. 40 dye. Absorbance 20% 2ML Part A: Making a Calibration Curve for Beer's Law 1. Calculate the concentrations of each of your diluted Red No. 40 solutions and add these to Table 4.2. Show at least one sample calculation in the space below. 0.251 0.192 Total Volume 0.181 0·119 0.060 (mL) 10 mL 10 mL 10 mL 10 mL 10 mLo/index.html?deploymentld%3D55750828934189288909969212&elSBN=9781305657571&snapshotld%3D2199... Tp * NDTAP Q Search this co Use the References to access important values if needed for this question. Cyclopentasilane (SigH10) is a liquid with a density of 0.963 g cm3. It reacts with oxygen to give silicon dioxide (SiO2) and water. Calculate the mass of water that would form if 29.4 cm³ of cyclopentasilane reacted completely with excess oxygen. g water Submit Answer 4 question attempts remaining9. The method described in Problem 5-8 is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative error resulting from a 0.4-mg loss is not to exceed(a) -0.1%? (b) -0.4%? (c) -0.8%? (d) -1.1%? Here is the number 5-8 5. Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid.6. How are systematic method errors detected?7. What kind of systematic errors are detected by varying the sample size?8. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample isa. 500 mg. b. 50 mg. c. 150 mg.d. 70 mg.
- I need step by step process solving [4.184x156(Tf-295)] + [4.184x85.2(Tf-368)] = 0. because my work is wrong. Thank you!!Name: Lyna Nichols NetID: Imn 194 9. A 0.250 L sample of blood plasma was found to weigh 0.25625 kg. What is the density (in g mL-¹) of blood plasma? 1L =1000 mL 250mL 256259 1 kg = 1000g 2578-5.9 250 ml over bluorle noitampo rise to 11. Convert 843 nm to m. = Im | nm = 10-9 m 100,000,000 nm .. 10. Laboratories that perform blood tests can perform 14 individual tests from a single 100.0µL sample of blood. Assuming each test required the same volume of blood, what volume (in µL) of blood is needed per test? = 10025 $1.02gmL- 0.0056709 ✓ significant Figures leading zeros not significant. 843nm = mgg VML 843, 843mm x 10-9 4 significant Figures 4 digits with a decimar 43-08 8.43 x 10-7m 12. How many significant figures are in the following set of numbers? 0.0056709; 1.157×107; 2 1.157 x 107 x 10-9 m ont enimmets. ㅇ ㅋ m | AACST) 1.81 x 6 eara A: 1.02 I significant Figure. A: 7.143 IsrW A: 8.43 x 10-7 =1 A: 5, 4, 1. Experimental data mass (g) and volume (mL) of a substance was gathering, recorded, and plotted in Figure 1. a. Correctly la bel the graph axis (include units). b. The equation for the trendline (y = mx + b) is displayed on the graph. Which variable, in the equation, equals the density of the substance? A1 feMass B D Mass Volume 2. 1,8 2,19 Mass vs. volume 3 3,15 4,08 4,13 5,57 7. 6,7 8,34 6. y= 0,794x-0.064 8 6. 10 11. 2 4. 10 13 14 15 Figure 1: Plotting of Mass vs. Volume of a Substance. bttps://www.chemisalforums.com/index.php?toric=69575.0 Life University CHM 111 March 2021 Default Page Style English (USA)
- -3 (e) Jika 0.1 mol dm asid hidroklorik digunakan untuk mentitrat 50.00 cm' larutan kalium hidroksida, didapati bahawa isipadu 0.1 mol dm asid hidroklorik diperlukan adalah dua kali ganda isipadu 0.1 mol dm asid sulfurik. Terangkan mengapa.A solution containing Cu2+ is analyzed by atomic absorption and gives an absorbance of 0.01000 units. The solution is spiked to increase the Cu2+ concentration by 2.000 mg/L and then gives an absorbance of 0.01613 units. (a) What is the concentration of Cu2+ in the solution (mg/L)? (b) The 1.000 mg/L solution of Cu2+ alone gave an absorbance of 0.00408 units; was the standard addition needed? Yes or NoWhat is a 99% confidence interval uncertainty of the slope when we are given a trendline with a slope of 42.211 and an R² value of 0.9991 for a set of 145 data points?