Explain how the H2CO3/HCO3 buffer system helps maintain blood serum at constant pH with the help of chemical equations. At what pH is it most effective?
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A: Product of following reaction can be made by applying appropriate reaction mechanism.
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- Apatite, Ca5(PO4)3OH, is the mineral in teeth. On a chemical basis explain why drinking milk strengthens young children’s teeth. Sour milk contains lactic acid. Not removing sour milk from the teeth of young children can lead to tooth decay. Use chemical principles to explain why.Identify the two active species in each of the following buffer systems. a. HCN and KCN b. H3PO4 and NaH2PO4 c. H2CO3 and KHCO3 d. NaHCO3 and K2CO3How does NaC2H3O2 act as a buffer?
- What is the number of moles of 10.0 g NH₄Cl? What is the molar concentration of NH₄Cl? What is the pH of the buffer solution?Identify 2 active species in the following buffer systems HCN & KCN H3PO4 & NaH2PO4 H2CO3 & KHCO3 NaHCO3 & K2CO3Graph the data by plotting the pH (y-axis) versus the amount of citricacid solution added (x-axis). Make sure that you label the axes of thegraph Titration Data Titration of NaOH Volume Citric Acid Solution Added (mL) pH 0.0 mL (initial) 7.8 0.5 mL 7.8 1.0mL 7.2 1.5 mL 7.1 2.0 mL 6.9 2.5 mL 6.8 3.0 mL 6.7 3.5 mL 6.6 4.0 mL 6.5 4.5 mL 6.4 5.0 mL 6.2 5.5 mL 6.1 6.0 mL 5.9 6.5 mL 5.9 7.0 mL 5.8
- How does the carbonic acid–bicarbonate buffer system play an extremely important role in maintaining pH homeostasis of the blood?During the fermentation of wine, a buffer system consisting of tartaric acid and potassium hydrogen tartrate is produced by a biochemical reaction. Assuming that at some time the concentration of potassium hydrogen tartrate is twice that of tartaric acid, calculate the pH of the wine. The pKa of tartaric acid is 2.96.1,2-Dichloroethane is a volatile organic compound that was once added to gasoline along with the heavy metal lead. At many former gasoline storage sites, the unsaturated soil and groundwater are still contaminated with 1,2-dichloroethane. One of the concerns with volatile organic compounds in the unsaturated zone of soil is that they can diffuse into buildings and contaminate the air. Calculate the concentration of 1,2- dichloroethane in air that will result in a carcinogenic risk of 104, based on a breathing rate of 11.3 m/d, exposure for 10 hours per day, and an inhalation PF of 9.1x102 kg•d/mg. Express your answer in µg/m³. А. Calculate the concentration of 1,2-dichloroethane in groundwater that will result in a hazard quotient of 1, based on drinking 2 L of water per day for a lifetime and an oral RfD of 0.012 mg/(kg d). Express your answer in ppb. В.
- The special molecule that removes ions, EDTA, can remove calcium ions from the blood. When it does this specific task, it is classified as a(n) ___. antipolymerant antioxidant anticoagulant bufferThe concentration of acetylcholine (a neurotransmitter) in a sample can be determined from the pH changes that accompany its hydrolysis. When the sample is incubated with the enzyme acetylcholinesterase, acetylcholine is converted to choline and acetic acid, which dissociates to yield acetate and a hydrogen ion. CНз CHз Нао — сHz— CH "N— снз но-сн— сH,-"N-CH; + CH;— с-о+ н* CH3-C-0- сHз CHз Choline Acetylcholine Acetate In a typical analysis, 11 mL of an aqueous solution containing an unknown amount of acetylcholine had a pH of 7.70. When incubated with acetylcholinesterase, the pH of the solution decreased to 6.89. Assuming there was no buffer in the assay mixture, determine the number of moles of acetylcholine in the 11 mL sample.Chemistry a malate buffer solution.
