What is the equivalent calcium carbonate concentration of (a) 117 mg/L of NaCl and (b) 2 x 10-3 mol of NaCl?
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- Ca+2 = 36.8mg/L Mg+2 = 2.9mg/L HCO3 = 98mg/L pH = 7.53 Temp = 9C Calculate the following: a. Hardness in units of mg/L as CaCO3 b. Ionic strength (be sure to include H++ and OH--) c. PCO2 in equilibrium with the sample d. Saturation index with respect to calcite (SIC) e. Saturation index with respect to dolomite (SID)Communicate the steps during the titration of a weak base with a strong acid. Explain the major concepts of titration and how to calculate the pH at any point on the curve.(Explain as if someone is learning the topic for the first time)If a sample of tap water contains 400 ppm of Ca2+ and 80 ppm of Mg2+, what is the hardness of this water sample in terms of equivalent concentration CaCO3, in mg/L? a.80 ppm CaCO3 b. 400 ppm CaCO3 c. None
- Explain which kind of microstructures you expect to observe at room temperature if an iron-carbon alloy of eutectoid composition is cooled down following the red and blue curves. 800 727° 700 Coarse pearlite 600 a+ FeC Fine pearlite 500 y+ a+ Fe,C 400 Bainite 300 M5- 200 so - Mo 100 1 sec 1 min 1 hour 1 day 102 103 104 105 0.1 10 Time, seconds(Lala) A Glycerin has a Mass(M)= 945 Kg. And a Volume (V)= 0.750 M3.---The Specific Weight.8 :is )1 نقطة(The pH scale was designed to make it convenient to express hydrogen ion concentrations that are small in aqueous solutions. The definiton of pH is in terms of base 10 logarithms. pH – log[H*] where H+ is the hydrogen ion concentration. a. If the hydrogen ion concentration in a solution is 2.51 × 10-4 mol/L, the pH is b. If the pH of a solution is 3.433, the hydrogen ion concentration is mol/L.
- The efficiency for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal loss (both in mg/ft2). An article gave the accompanying data on tank temperature (x) and efficiency ratio (y). Temp. 171 Ratio 0.78 1.29 1.34 y = 173 174 Ratio Temp. 181 Ratio 1.47 1.62 1.63 2.09 181 181 Temp. 183 183 183 175 1.83 1.98 2.78 1.13 181 185 175 1.17 181 2.21 185 176 1.14 182 0.86 186 177 1.02 182 1.45 187 178 1.82 183 0.82 189 1.59 2.42 3.10 1.97 3.00 (a) Determine the equation of the estimated regression line. (Round all numerical values to four decimal places.) (b) Calculate a point estimate for true average efficiency ratio when tank temperature is 183. (Round your answer to four decimal places.) (c) Calculate the values of the residuals from the least squares line for the four observations for which temperature is 183. (Round your answers to two decimal places.) (183, 0.82) (183, 1.83) (183, 1.98) (183, 2.78) Why do they not all have the same…sodium fluoride and aluminum sulfate Туре: double displacement single displacement Molecular: Total lonic: Net lonic: If single displacement What is oxidized? What is reduced? How can you tell? How can you tell?211 In engineering applications there is a wide range of pipe wall roughness due to the different materials and methods of manufacture used to produce commercial pipes. Generally, flowing acids in a rough pipe is quite dangerous since the internal molecules collide each other by friction and then it could explode. You are supposed to determine whether the pipe is rough or smooth for a liquid of specific gravity 0.60 and absolute viscosity 5.5 x 10-4 NS/m2 flowing through a pipe of diameter 0.2 m at the rate of 50 litres per second. If the loss of head in 100 m length of pipe is 5.56 m.
- What temperature is required to obtain 0.4%C at a distance of 0.3 mm beneath the surface of a 0.22% C steel in 2h, when 1.1% C is present at the surface? Assume that the iron is FCC. (Please see figure 5.12 below for diffusion coefficient data. Please use your notes for a table of erf() function values Diffusion coefficient D (cm²/s) ܐ ܐ ܐ ܐ 10- 10-5 10- 10-10 10-11 10-12 10-13 10-14 10-15 Temperature (°C) 2000 1500 1200 1000 900 800 700 600 Cin graphite Mg in MgO Ca in Cao H in FCC iron C in FCC iron Fe in FCC iron Fe in BCC iron H in BCC iron C in BCC iron Fe in FeO 500 5 6 7 8 9 10 11 12 13 104 T(K) Figure 5-12 The diffusion coefficient D as a function of reciprocal temperature for some metals and ceramics. In this Arrhenius plot, D represents the rate of the diffusion process. A steep slope denotes a high activation energy.Question 6 (of 8) 6. The density of platinum is 21500 kg/m³ and that of aluminum is 2702 kg/m³. Find the ratio of the volume of 1.80 kg of platinum to the volume of 1.17 kg of aluminum.Discuss atleast 5 sources of carbon monoxide and atleast 5 sources of carbon dioxide