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Chemistry
1 g of NaOH was added to 30 cm3 of 1 mol/dm3 HCl. How many cubic meters 0.1 mol/dm3 KOH solution will neutralize excess acid?
Chemistry
What is the pH of 5.0756mg barium hydroxide octahydrate in4.6 liters of water, and the pH of 0.19789g dihydrogen sulfate in 374mL of water both are separate and at 25 degrees C with nothing else present, assume no change of volume and or temp.
Chemistry
1) A 0.15 L solution of .30 M MgCl2 is mixed with .15 L of .10 M Na2CO3. Calculate the molar concentration of the carbonate ion left after MgCO3 precipitates. What percentage of the carbonate ion precipitated?
2)a)What is the concentration of SO4 just as BaF2 begins to precipitate when 1.0 M Ba(NO3)2 is added to a solution containing .60 M F and .50 M So4? b)What percent of the sulfate ion remains in solution when the BaF2 begins to preciptiate? c)O Would fractional precipitation work to separate BaF2 and BaSO4? EXPLAIN your answer.
2)a)What is the concentration of SO4 just as BaF2 begins to precipitate when 1.0 M Ba(NO3)2 is added to a solution containing .60 M F and .50 M So4? b)What percent of the sulfate ion remains in solution when the BaF2 begins to preciptiate? c)O Would fractional precipitation work to separate BaF2 and BaSO4? EXPLAIN your answer.
Chemistry
If a buffer solution is 0.140 M in a weak acid (Ka = 1.5 × 10-5) and 0.560 M in its conjugate base, what is the pH?
Chemistry
Carol the brilliant laboratory technician, was asked to make up 5 litres of 2M solution of HCL from the concentrated solution. unfortuently she lost her preparation notes and cannot remember the volumes required. The label on the right was scanned from the concentration HCL bottle obtained from the European chemical company Scharlau.
The Two critical pieces of data are:
32% reagent grade which means the chemical has a minimum assay strength of 32% volume per volume
And D=1,15 g/cm3 means the chemical has a density of 1/15 grams per ml
Calculate the concentration of the moles per litre (molarity) of the concentrated solution?
Ps. im having trouble with the volume/ volume bit?
The Two critical pieces of data are:
32% reagent grade which means the chemical has a minimum assay strength of 32% volume per volume
And D=1,15 g/cm3 means the chemical has a density of 1/15 grams per ml
Calculate the concentration of the moles per litre (molarity) of the concentrated solution?
Ps. im having trouble with the volume/ volume bit?
Chemistry
How many moles are in 550 g of CaCO3?
Chemistry
In the chemical reaction, CaCl2+Na2Co3 yields CaCo3 + NaCl why does Co3 still keep the subscript of 3 even though when you crossed the positive 2 and negative two charges they canceled each other out?
Chemistry
1 example of conversion from mole to grams
Chemistry
How many liters of CO are needed to react with 136.7 grams of Fe3O4 at STP?
Chemistry
How many grams of carbon dioxide are produced if 68.2 grams of Fe3O4 are reacted?
