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f NazSO4. 2. Can the pH of a water sample be calculated from its...
2. [20 marks] Fresh water from rivers and lakes varies in acidity/alkalinity depending on the rocks and soils it runs over. Granite country yields water that is slightly acidic, while water from limes...
2. [20 marks] Fresh water from rivers and lakes varies in acidity/alkalinity depending on the rocks and soils it runs over. Granite country yields water that is slightly acidic, while water from limestone country is slightly alkaline. Acidity and alkalinity are measured on a pH scale, on which 7 is neutral, values below 7 are acidic and values above 7 are alkaline. pH can change due to pollution or due to waste from biomass such as algae. A certain river,...
Alkalinity: The approximate alkalinity of a water sample is 2.21 x 10-2 M at pH=10.33. Determine...
Alkalinity: The approximate alkalinity of a water sample is 2.21 x 10-2 M at pH=10.33. Determine the concentration of carbonate (CO32-) in M and mg/L as CaCO3. (pKa=10.33). Answer: [CO32-] = 7.37x10-3 M and 737 mg/L as CaCO3 Please show the solution to this problem.
can you also show the excel functions for this? The pH scale measures the amount of...
can you also show the excel functions for this?
The pH scale measures the amount of alkalinity or acidity in a liquid and ranges from 0 to 14. The ideal pH for a swimming pool is 7.2. A pH that is too high or low can cause discomfort for the swimmers, especially in the eyes. Chemicals need to be added to the water to adjust the pH to the desired level. 20 pH readings were taken at the Wilson Community...
Table 1. Chemical composition of two water samples. Parameter Sample A Sample B pH 6.5 6.8...
Table 1. Chemical composition of two water samples. Parameter Sample A Sample B pH 6.5 6.8 Alkalinity (mg L1 as CaCO3) K* (mg L Na (mg L) Mg2 (mg L-) Ca2 (mg L1) NO3 (mg L) Cr (mg L.) SO2- (mg L.1) 340 45 32 1.4 14 2700 160 6.7 4500 140 2.4 0.1 31 9800 44 16 PO4-P (mg L.1) 0.28 0.12 Density (kg L1) 1.012 1.000 f) Calculate the charge balance error for both samples. Is there any...
need HW help thx! 2. For the following, assume pKi = 6.35 and pK2 10.33. (a) The alkalinity and initial pH of a wate...
need HW help thx!
2. For the following, assume pKi = 6.35 and pK2 10.33. (a) The alkalinity and initial pH of a water sample are measured to be 0.01 eq/L and 6.35. What are the bicarbonate and carbonate concentrations in mol/L? Answer: 0.01 Mand 0 (b) The alkalinity and initial pH of a water sample are measured to be 500 mg/L as CaCO3 and 10.33. What are the bicarbonate and carbonate concentrations in mg/L? Answer: 199 and 196 mg/L...
The pH of a liquid is a measure of its acidity or alkalinity. Pure water has...
The pH of a liquid is a measure of its acidity or alkalinity. Pure water has a pH of 7, which is neutral. Solutions with a pH less than 7 are acidic while solutions with a pH greater than 7 or basic or alkaline. A random sample of lakes in Florida was taken and the pH was recorded for each lake. Summary statistics are given below. The primary question to answer is: "Is there evidence to indicate the mean pH...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of acidity or alkalinity of a solution). As you may recall, the pH scale extends from 0 (very acidic) to 7 (neutral) to 14 (very alkaline or basic). We can use chemicals called buffers to help maintain a specific pH in solution. The pH scale and buffers are described in your online text (section 2.2, https://openstax.org/books/concepts- biology/pages/2-2-water). The spot plate diagram below shows a series...
Can I get the answer in steps please! 22. If a container of pure water is...
Can I get the answer in steps please!
22. If a container of pure water is shaken in the air, the water will dissolve atmospheric carbon dioxide until the dissolved gas reaches the solubility of Co2, 1X10-5 M, the acidity constant K1, of the carbonic acid is 4*10t-7. What would be the pH o with Co2? f the water saturated
please help 9. (13 points) A sample of water has the following concentrations of ions, assuming...
please help
9. (13 points) A sample of water has the following concentrations of ions, assuming no other constituents are missing: Cations mg/L Anions mg/L Ca 40 HCOị 100 Mg? 10 CO;2- 100 Na ? SO/2 67.2 K Ch 11 н — | ОН ? (a) If the solution has the pH of 10.2, what are the concentrations of H' and OH? For H,O-> H + OH, the equilibrium constant equals 10.(3 points) (b) Use an anion-cation balance to estimate...
I need help finding calculated pH for part IV and part V please! pKa of acetic...
I need help finding calculated pH for part IV and part V
please!
pKa
of acetic acid= 4.744
su 13.21 Part IV: Dilution of Buffered and Unbuffered Solutions Calculated pH | Calculated ApH Observed pH Observed ApH Number Preparation 15 ml. HC H3O2(aq) 15 ml NaC,HO2(aq) 5 ml Solution 1 25 mL H20 5 ml Solution 2 25 ml H20 4 30 mL HC H2O2(aq) 5 ml Solution 4 25 ml H2O 5 ml Solution 5 25 ml. H2O 4.10...
can you also show the excel functions for this?
The pH scale measures the amount of alkalinity or acidity in a liquid and ranges from 0 to 14. The ideal pH for a swimming pool is 7.2. A pH that is too high or low can cause discomfort for the swimmers, especially in the eyes. Chemicals need to be added to the water to adjust the pH to the desired level. 20 pH readings were taken at the Wilson Community...
Table 1. Chemical composition of two water samples. Parameter Sample A Sample B pH 6.5 6.8 Alkalinity (mg L1 as CaCO3) K* (mg L Na (mg L) Mg2 (mg L-) Ca2 (mg L1) NO3 (mg L) Cr (mg L.) SO2- (mg L.1) 340 45 32 1.4 14 2700 160 6.7 4500 140 2.4 0.1 31 9800 44 16 PO4-P (mg L.1) 0.28 0.12 Density (kg L1) 1.012 1.000 f) Calculate the charge balance error for both samples. Is there any...
need HW help thx!
2. For the following, assume pKi = 6.35 and pK2 10.33. (a) The alkalinity and initial pH of a water sample are measured to be 0.01 eq/L and 6.35. What are the bicarbonate and carbonate concentrations in mol/L? Answer: 0.01 Mand 0 (b) The alkalinity and initial pH of a water sample are measured to be 500 mg/L as CaCO3 and 10.33. What are the bicarbonate and carbonate concentrations in mg/L? Answer: 199 and 196 mg/L...
The pH of a liquid is a measure of its acidity or alkalinity. Pure water has a pH of 7, which is neutral. Solutions with a pH less than 7 are acidic while solutions with a pH greater than 7 or basic or alkaline. A random sample of lakes in Florida was taken and the pH was recorded for each lake. Summary statistics are given below. The primary question to answer is: "Is there evidence to indicate the mean pH...
pH Effects on Enzyme Activity Another environmental factor regulates enzyme activity is pH (the level of acidity or alkalinity of a solution). As you may recall, the pH scale extends from 0 (very acidic) to 7 (neutral) to 14 (very alkaline or basic). We can use chemicals called buffers to help maintain a specific pH in solution. The pH scale and buffers are described in your online text (section 2.2, https://openstax.org/books/concepts- biology/pages/2-2-water). The spot plate diagram below shows a series...
Can I get the answer in steps please!
22. If a container of pure water is shaken in the air, the water will dissolve atmospheric carbon dioxide until the dissolved gas reaches the solubility of Co2, 1X10-5 M, the acidity constant K1, of the carbonic acid is 4*10t-7. What would be the pH o with Co2? f the water saturated
please help
9. (13 points) A sample of water has the following concentrations of ions, assuming no other constituents are missing: Cations mg/L Anions mg/L Ca 40 HCOị 100 Mg? 10 CO;2- 100 Na ? SO/2 67.2 K Ch 11 н — | ОН ? (a) If the solution has the pH of 10.2, what are the concentrations of H' and OH? For H,O-> H + OH, the equilibrium constant equals 10.(3 points) (b) Use an anion-cation balance to estimate...
I need help finding calculated pH for part IV and part V
please!
pKa
of acetic acid= 4.744
su 13.21 Part IV: Dilution of Buffered and Unbuffered Solutions Calculated pH | Calculated ApH Observed pH Observed ApH Number Preparation 15 ml. HC H3O2(aq) 15 ml NaC,HO2(aq) 5 ml Solution 1 25 mL H20 5 ml Solution 2 25 ml H20 4 30 mL HC H2O2(aq) 5 ml Solution 4 25 ml H2O 5 ml Solution 5 25 ml. H2O 4.10...
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