The given choices are as follows
A. add 0.833 mL 12 M HCl stock solution to 99.167 mL water
B.add 0.833 mL 12 M HCl stock solution to 49.167 mL water
C.<span>add 0.833 mL 12 M HCl stock solution to 199.167 mL water
the experiment requires 15.0 mL for each experiment. To conduct at least three experiments the volume needed would be 15.0 x 3 = 45.0 mL
We will need an excess amount of HCl in addition to the 45.0 mL as solutions are required in excess to wash the glassware </span>e.g.: burettes with the solution.
So lets take the required volume of HCl to be prepared as 100.0 mL
now when preparing diluted solutions from stock solutions we can use the dilution equation
c1v1 = c2v2
where c1 = concentration and v1 is volume required from the stock solution
c2 is concentration and v2 is volume of diluted solution to be prepared
substituting the values in the equation
12.0 M x V1 = 0.100 M x 100.0 mL
V1 = 0.833 mL
therefore 0.833 mL should be taken from the 12.0 M stock solution and final volume of 0.100 M HCl to be prepared is 100.0 mL . to make it up to the 100.0 mL mark we need to add (100.0 mL - 0.833 mL ) = 99.167 mL of water.
correct answer is A. add 0.833 mL 12 M HCl stock solution to 99.167 mL water
Answer:
Any law or theory needs to do two things to give them credibility: explain and predict.
Most laws and theories attempt to explain, some better than others. Many theories do not have predictive power, although we would expect all laws should have strong predictive powers. The stronger the predictive power of a theory the better the theory will be.
Explanation:
If 14 grams of hydrogen reacted with 24.7 grams of oxygen 27.7875 grams of water will be formed.
Explanation:
2H2+O2----------->2H2O.
- From the above equation, we can say that 4g of Hydrogen will react with 32 g of oxygen.
- In this question, Hydrogen is in excess amount.
- 32 g of Oxygen will react with = 4 g of H2.
- Therefore 24.7g of Oxygen will react with =24.7x4/32= 3.0875 g H2.
- The remaining 10.9125g of H2 will be left unreacted.
- Therefore the amount of water formed=(24.7+3.0875)=27.7875 g
Answer:The bubbles exhaled by a scuba diver grow as they approach the surface of the ocean. The pressure exerted by the weight of the water decreases with depth, so the volume of the bubbles increases as they rise.
Explanation:
Answer:
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