Answer:
c.
Explanation:
A serial dilution is a dilution that is made fractionated. The stock solution is diluted, then this now solution is diluted, and then successively. The final dilution is the multiplication of the steps dilutions.
The representation of the dilution is v/v (volume per volume) indicates how much of the stock solution is in the total volume of the solution. So 1/5 indicates 1 mL to 5 mL of the solution. If the final volume must be 1 mL, then the stock solution must be 0.2 mL (0.2/1 = 1/5), and the volume of the solvent is 1 mL - 0.2 = 0.8 mL.
The second solution is done with a dilution of 1/10 or 1 mL of the first solution in 10 mL of the total solution. Because the solution has 1 mL, then the volume of the first solution must be 0.1 mL (0.1/1 = 1/10), and the volume of the solvent that must be added is 1 mL - 0.1 mL = 0.9 mL.
Anywhere between 5sogt2 and 776sogt2
Answer:
iconic bonded unit
polyatomic ions can be covalently bonded
it has cations and anions
Answer:
d . all of the above
Explanation:
A buffer system can be formed in one of two ways:
- A weak acid and its conjugate base
- A weak base and its conjugate acid
Which of the following combinations would form a buffer solution?
a. HF and LiF. YES. HF is a weak acid and F⁻ (from LiF) is its conjugate base.
b. NH₃ and NH₄Br. YES. NH₃ is a weak base and NH₄⁺ (from NH₄Br) is its conjugate acid.
c. HNO₂ and NaNO₂. YES. HNO₂ is a weak acid and NO₂⁻ (from NaNO₂) is its conjugate base.
Answer:
wear safety goggles to protect your eyes
Gloves to protect your hands
Stand a distance away from it to make sure you dont get burnt by the fire
etc
Explanation:
