In an experiment, 0.20 mol Br₂ and 0.20 mol Cl₂ are mixed in a 1.00 L container, and the reaction forms BrCl. If K = 6.25 for this reaction, what is the equilibrium concentration (in mol/L) of BrCl? (Please provide your answer with 2 significant figures.)

In 'n eksperiment word 0.20 mol Br₂ en 0.20 mol Cl₂ in 'n 1.00 L houer gemeng, en die reaksie vorm BrCl. As K = 6.25 vir hierdie reaksie, wat is die ewewigskonsentrasie (in mol/L) van BrCl? (Gee asb jou antwoord met 2 beduidende syfers.)

In the final step of the reaction mechanism, an unknown entity "X" removes the final proton. X can only be one of two molecules in the reaction:

1. H₂O, or
2. Cl^–

Which molecule is most likely to be X? You need to justify your answer using chemical principles.

In die laaste stap van die reaksiemeganisme, verwyder 'n onbekende entiteit "X" die finale proton. X kan slegs een van twee molekule in die reaksie wees:

1. H₂O, of
2. Cl^– 

Watter molekuul is mees waarskynlik X? Jy moet jou antwoord regverdig deur chemiese beginsels te gebruik.

In the final step of the reaction mechanism, an unknown entity "X" removes the final proton. X can only be one of two molecules in the reaction:

1. H₂O, or
2. Cl^–

Which molecule is most likely to be X? You need to justify your answer using chemical principles.

In die laaste stap van die reaksiemeganisme, verwyder 'n onbekende entiteit "X" die finale proton. X kan slegs een van twee molekule in die reaksie wees:

1. H₂O, of
2. Cl^– 

Watter molekuul is mees waarskynlik X? Jy moet jou antwoord regverdig deur chemiese beginsels te gebruik.

K_a(HF) = 6.6 x 10^-4

K_a(NH₃) = 5.6 x 10^-10

What is the solubility (in moles/L) of CuCl in a solution that also contains 0.027 M CuNO₃ (the latter is fully soluble)? (K_sp CuCl = 1.0 x 10^-6)

Please provide your answer to 2 significant figures.

Wat is die oplosbaarheid (in mol/L) van CuCl in 'n oplossing wat ook 0.027 M CuNO₃ bevat (laasgenoemde is ten volle oplosbaar)? (K_sp CuCl = 1.0 x 10^-6)

Gee asb jou antwoord tot 2 beduidende syfers.

At what pH will a solution of 0.150 M Cu²⁺ begin to precipitate as Cu(OH)₂?  The K_sp for Cu(OH)₂ is 1.6 x 10^-19.

Provide your answer to 2 decimal places.

By watter pH sal ʼn oplossing van 0.150 M Cu²⁺ begin neerslaan as Cu(OH)₂? Die K_sp vir Cu(OH)₂ is 1.6 x 10^-19.

Gee jou antwoord met 2 desimale syfers.

You need to prepare a buffer solution containing amongst other things 0.300 moles of HF. In addition you have only HBr, CH₃COOH, NaOH and NH₃ solutions available.

Indicate which one of these solutions you will combine with the HF solution in order to produce a buffer solution. Specify whether you will need less, the same or more than 0.300 mol of the second compound and explain briefly how this will be able to produce a buffer.

Jy moet 'n bufferoplossing voorberei wat onder andere 0.300 mol van HF bevat. Hiermee saam het jy slegs HBr, CH₃COOH, NaOH en NH₃ oplossings beskikbaar.

Dui aan watter een van hierdie oplossings jy met die HF oplossing sal kombineer om 'n bufferoplossing te produseer. Spesifiseer of jy minder, dieselfde of meer as 0.300 mol van die tweede verbinding sal benodig en verduidelik kortliks hoe dit sal werk om 'n buffer te produseer.

A buffer system, used as an ingredient for a certain diet soft drink, is prepared by combining 2.00 L of a 0.250 M citric acid solution and 4.00 L of a 0.800 M sodium citrate salt solution.

Citric acid has a K_a value of 7.40 x 10^-4.

Calculate the number of moles of a Ba(OH)₂ solution that can be added to this buffer solution that will lead to depletion of the buffer.

Provide your answer with 3 significant figures.

ʼn Buffersisteem, wat as bestanddeel vir 'n sekere dieetkoeldrank gebruik word, word voorberei deur 2.00 L van 'n 0.250 M sitroensuuroplossing en 4.00 L van 'n 0.800 M natriumsitraat soutoplossing te kombineer.

Sitroensuur het ʼn K_a waarde van 7.40 x 10^-4. 

Bereken die aantal mol van 'n Ba(OH)₂ oplossing wat by hierdie bufferoplossing gevoeg kan word wat tot uitputting van die buffer sal lei.

Gee jou antwoord met 3 beduidende syfers.

A buffer system, used as an ingredient for a certain diet soft drink, is prepared by combining 2.00 L of a 0.250 M citric acid solution and 4.00 L of a 0.800 M sodium citrate salt solution.  

What will the pH of this soft drink be if 0.200 moles of NaOH is added to it? Citric acid has a Ka value of 7.40 x 10^-4.

Provide your answer to 2 decimal places.

ʼn Buffersisteem, wat as bestanddeel vir 'n sekere dieetkoeldrank gebruik word, word voorberei deur 2.00 L van 'n 0.250 M sitroensuuroplossing en 4.00 L van 'n 0.800 M natriumsitraat soutoplossing te kombineer.  

Wat sal die pH van hierdie koeldrank wees indien 0.200 mol NaOH daarby gevoeg word? Sitroensuur het ʼn Ka waarde van 7.40 x 10-4.

Gee jou antwoord tot 2 desimale syfers.

Formic acid, HCOOH, is an organic acid that is found naturally in the bodies of some ants. What is the percent ionization of a 0.77 M solution of formic acid if the pK_a value is 3.75?

Please provide your answer with 3 significant figures.

Mieresuur, HCOOH, is 'n organiese suur wat natuurlik in die liggame van sommige miere voorkom. Wat is die persentasie ionisasie van 'n 0.77 M oplossing van mieresuur as die pK_a waarde 3.75 is?

Gee asb jou antwoord met 3 beduidende syfers.