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Chemistry / Chemie - 144
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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.) |
Br2(g) + Cl2(g) 2 BrCl(g)
What is the maximum volume (in mL) of 1.50 M HBr that can be added to 100 mL of a HEPES buffer solution that contains 0.040 mol HEPES weak acid and 0.030 mol HEPES weak base before depleting the buffer capacity? Please give your answer to two significant figures. | Wat is die maksimum volume (in mL) van 1.50 M HBr wat by 100 mL van 'n HEPES-bufferoplossing gevoeg kan word wat 0.040 mol HEPES swak suur en 0.030 mol HEPES swak basis bevat voordat die bufferkapasiteit uitgeput word? Gee asseblief jou antwoord met twee desimale plekke. |
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Hydroxide ions also form a precipitate in the presence of aluminium ions in order to precipitate as Al(OH)3. If the Ksp of Al(OH)3 is 1.8 x 10-33, what is the solubility (in mol/L) of Al(OH)3? Please provide your answer rounded to 2 significant figures. | Hidroksiedione vorm ook 'n neerslag in die teenwoordigheid van aluminiumione om as Al(OH)3 neer te slaan. Indien die Ksp van Al(OH)3 1.8 x 10-33 is, wat is die oplosbaarheid (in mol/L) van Al(OH)3? Gee asb jou antwoord afgerond tot 2 beduidende syfers. |
Morphine is a narcotic that is used to relieve pain. A solution of morphine has a pH of 9.61 at 25 °C. What is the hydroxide ion concentration in the solution? Please give your answer to 3 significant figures. | Morfien is 'n narkotiese middel wat gebruik word om pyn te verlig. 'n Oplossing van morfien het 'n pH van 9.61 by 25 °C. Wat is die hidroksiedioonkonsentrasie in die oplossing? Gee asseblief jou antwoord tot 3 beduidende syfers. |
Determine the pH of a solution that contains 0.045 M of the HEPES weak acid (Ka = 3.2 x 10-8). Please give your answer to two decimal places. | Bepaal die pH van 'n oplossing wat 0.045 M van die HEPES swak suur bevat (Ka = 3.2 x 10-8). Gee asseblief die antwoord tot twee desimale plekke. |
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Oxygen and ozone form an equilibrium mixture according to the chemical equation below. The concentration of O3 in a flask at the start of a reaction is 1.46 M and the concentration of O2 at equilibrium is 0.960 M. Calculate Kc. (Please give your answer with 3 significant figures.) | Suurstof en osoon vorm ʼn ewewigsmengsel na aanleiding van die chemiese reaksie hieronder. Die konsentrasie van O3 in ʼn fles is aanvanklik 1.46 M en die konsentrasie van O2 by ewewig is 0.960 M. Bereken Kc. (Gee asb jou antwoord met 3 beduidende syfers.) |
2 O3(g) ⇌ 3 O2(g) |
A solution contains 0.0022 M Ag+ and 1.6 x 10-5 M Zn2+, and the ions need to be separated. For this purpose What will the concentration of | 'n Oplossing bevat 0.0022 M Ag+ en 1.6 x 10-5 M Zn2+ en die ione moet geskei word. Hiervoor word Wat sal die konsentrasie van |
| What mass of NaF must be added to 1.0 L of 0.0033 M Pb2+ to initiate precipitation of PbF2(s)? (Ksp of PbF2 is 3.3 × 10-8; assume no volume change on addition of NaF.) (Please give your answer with 2 significant figures.) | Watter massa NaF moet by 1.0 L van 0.0033 M Pb2+ bygevoeg word om presipitasie van PbF2(s) te inisieer? (Ksp van PbF2 is 3.3 × 10-8; neem aan dat geen volumeverandering tydens toevoeging van NaF plaasvind nie.) (Gee asb jou antwoord met 2 beduidende syfers.) |
| Calculate the value of the reaction quotient, Q, of silver iodate (AgIO3) when 10.0 mL of 0.013 M AgNO3 is mixed with 10.0 mL of 0.02 M NaIO3. (Please give your answer with 2 significant figures.) | Bereken die waarde van die reaksiekwosiënt, Q, van silwerjodaat (AgIO3) wanneer 10.0 mL van ‘n 0.013 M AgNO3 oplossing gemeng word met 10.0 mL van ‘n 0.02 M NaIO3 oplossing. (Gee asb jou antwoord met 2 beduidende syfers.) |
| Determine the solubility of BaF2 in g/L if Ksp of BaF2 = 1.5 × 10-6. (Please give your answer with 2 significant figures.) | Bepaal die oplosbaarheid van BaF2in g/L indien Ksp van BaF2 = 1.5 × 10-6. (Gee asb jou antwoord met 2 beduidende syfers.) |