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1. HCL is a significant component of gastric juice. what is the concentration of chloride ion in gastric juice at pH=1.27?
2. Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32 x 10^-9. You have available at your lab bench a 0.1 M solution of Tris in its protonated form, 0.1 M solution of HCL and NaOH, and ample distilled water. Describe the preparation of 1L solution of 0.02M Tris buffer, PH 7.8.
3. What volume of glacial acetic acid (d= 1.06g/ml) and what weight of solid potassium acetate are required to prepare 5 liters of 0.2M acetate buffer,PH 5.0?
A solution of .637g of the solid in 24.1g of the solvent diphenyl gave a freezing point depression of 1.76 degree celsius. Calculate the molar mass and molecular formula of the solid(k1 for diphenyl is 8.00 degree celsius/m)
eject electrons from a mixed alkali metal photocathode, what is the longest wavelength in nm of light necessary to eject these electrons by the photoelectric effect?
When iron chloride FeCl3 is dissolved in water the solution becomes acidic. The preparation of the Fe(NO3)3 solution and the KSCN solution used 0.5 M HNO3 as the solvent instead of water. Explain why this was done
Predict the product(s) if the following reaction: Cs+Br2. The equation is not necessarily balanced. Express your answer as a chemical formula
Complete each of the following double displacement reactions and predict if the products will exist as (aq) or (s). A) Hg2(NO3)2+LiI B) NH4NO3+Li2CO3 C) NaCl+Li3PO4 D) AgC2H3O2+Cu(NO3)2
In the reaction of 1.00 mole carbon (C) with 3.00 mole oxygen (O2) to give CO2, if the actual yield is 30.0g
If 132 mL of wet H2 is collected over water at 24°C and a barometric pressure of 736 torr, how many grams of Zn have been consumed?
The number of nuclei decaying in a sample of Gallium-68 decreased by a factor of 4 over a period of 136.6 minutes. What is the half life of this isotope
The equilibrium constant, Kc, for the following reaction is 1.80E-2 at 698 K. 2 HI(g) H2(g) + I2(g) Calculate the equilibrium concentrations of reactant and products when 0.261 moles of HI are introduced into a 1.00 L vessel at 698 K. [HI] = M [H2..
How many stereoisomers are possible for each of the following substances? Draw them, and name each by the R-S and E-Z conventions.
What is the mass of a glucose solution that fills a 0.500 intravenous bottle if the density of the glucose solution is 1.15 ?
consider the following unbalanced equationca3po42 h2so4 ---gt caso4 h3po4what masses of calcium sulfate and
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