Chemistry, 31.07.2019 03:20 Person51761
During part i of the water analysis series, you prepared a stock solution of phosphate ion containing 50.0 mg p/l. in the second part of this experiment, you will use this stock solution to prepare standard solutions to be used to make a calibration plot. as described in the background information for this experiment, the concentration of phosphorus in these standards should be between 0 mg /l (solution a)and 0.6 mg/l (solution c). a. describe how you are going to prepare solution c, which must contain 0.3 mg p/l. assume you are going to use a 250-ml volumetric flask for this preparation. be sure to include necessary calculations !
Answers: 2
Chemistry, 22.06.2019 02:30
If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms
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Chemistry, 22.06.2019 02:30
Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh
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Chemistry, 22.06.2019 18:00
Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
During part i of the water analysis series, you prepared a stock solution of phosphate ion containin...
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