At which point will a buffer solution no longer have buffer capacity: a) once either 11) component of the pair is consumed; b) when a sugar solution is added to the buffered solution; c) when a weak acid that is not part of the buffer is added to the buffer solution; d) when a transition metal salt solution is added to the buffered solution? Explain your answer for each of the four. 12) H,CO; + H,O +→ HCO; + H;O* Since the carbonate ion CO,2 is a conjugate base of the bicarbonate ion HCO;, which in its turn is a conjugate base of carbonic acid H,CO3, would you expect a solution prepared from equal amounts of carbonic acid and carbonate to form a buffer solution? Why or why not? Given the following equation set: HCO; + H,O → CO;2 + H,O*

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A student prepares a 3.4M aqueous solution of propionic acid (C₂H₂CO₂H). Calculate the fraction of propionic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. % x10 X 5

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acid A student prepares a 1.2 M aqueous solution of benzoic acid (CH,CO,H). Calculate the fraction of benzoic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.

< STARTING AMOUNT X A brine solution is 3.50% NaCl by mass. Given that its density is 1.071 g/mL , determine the quantity of liters of solution that contains 5.00 moles of NaCl 5.00 ADD FACTOR 0.1 *( ) 3.50 10 35.45 Question 29 of 33 1.071 0.01 8.03 x 1022 1000 100 ANSWER 7.80 22.99 0.0156 L solution g NaCl/mL g solution mL solution kg solution g NaCl/g solution 58.44 6.022 x 1023 0.0780 moles of NaCl mol NaCl RESET 0.001 2 1 g NaCl 1.56

1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment

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Use the following data to answer questions 1-5 below. Metal Rxn with Rxn with Rxn with room Rxn with warm acid water steam temp acid Didn't observe Fizzes slightly Vigorous gas production Small bubbles Didn't observe NR Steady stream of bubbles Didn't observe C Didn't observe NR NR A few bubbles Didn't observe Didn't observe Vigorous Vigorous bubbles and the sample dissolves bubbles Question 1 Which of the following is the least active metal? O A OD O B MacBook Pro

A student prepares a 0.20M aqueous solution of acetic acid (CH3CO₂H). Calculate the fraction of acetic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. % 0 ☐x10 x