Would your calculated NaOH concentration be higher or lower than its actual concentration?
Table of Contents
- 1 Would your calculated NaOH concentration be higher or lower than its actual concentration?
- 2 Which is the best method for determination of concentration of solution?
- 3 What is the best method for determining the concentration of a solution?
- 4 How to identify the equivalence point of NaOH and HCl?
- 5 How do you measure the mass of NaOH?
Would your calculated NaOH concentration be higher or lower than its actual concentration?
thus the volume of NaOH used that was measured would be higher than it should be, making the calculated molarity lower than the actual value.
How do you find the expected concentration of sodium hydroxide?
Step 1: Calculate the amount of sodium hydroxide in moles
- Amount of solute in mol = concentration in mol/dm 3 × volume in dm 3
- Amount of sodium hydroxide = 0.100 × 0.0250.
- = 0.00250 mol.
- The balanced equation is: NaOH(aq) + HCl(aq) → NaCl(aq) + H 2O(l)
- So the mole ratio NaOH:HCl is 1:1.
How do you find the unknown concentration in a titration?
Starts here5:13How To Do Titration Calculations | Chemistry | FuseSchool – YouTubeYouTube
Which is the best method for determination of concentration of solution?
Answer: If the weight or volume of the solvent is specified, this means that you’re interested in the amount of solvent before the solute has been added. Molarity is probably the most commonly used way of measuring concentration and is defined as the number of moles of solute per liters of solution.
Which is best method to calculate concentration?
Divide the mass of the solute by the total volume of the solution. Write out the equation C = m/V, where m is the mass of the solute and V is the total volume of the solution. Plug in the values you found for the mass and volume, and divide them to find the concentration of your solution.
How do you calculate expected concentration?
What is the best method for determining the concentration of a solution?
Why can we not calculate the actual molarity of the NaOH solution by weighing NaOH pellets choose all correct answers there may be more than one correct answer?
the calculated molarity will be less than actual value because the water in the buret will dilute the naoh. NaOH pellets absorb water in the air, so their actual weight cannot be determined.
Why must the KHP samples be dried if they are not dried How would the results change high or low )?
The KHP and acid samples must be dried so that their measured masses are actually proportional to the number of moles of each acid sample. If they were not dried, they’d be heavier than they should with the excess water.
How to identify the equivalence point of NaOH and HCl?
NaOH and HCl are strong alkali and acid respectively. To identify Equivalence point we use titration curves. According to the solution concentration we have to choose correct curve. 0.1 moldm -3 HCl 25cm 3 is placed at a beaker. 0.1 moldm -3 NaOH solution is added to the HCl solution drop by drop.
What happens when NaOH is added to KHP solution?
The resultant Acidic solution was transparent, with a small amount of undissolved granules of KHP. As the transparent NaOH solution came into contact with transparent phenolphthalein in the KHP solution, it turned pink which on shaking became transparent.
What is the theoretical value of NaOH to be poured?
The theoretical value of NaOH to be poured was 9.50 cm 3, and more or less than 0.1 cm 3 of that value. However, the amount I added on an average was 10.4 cm 3, which suggests why the solution became unusually dark pink as supposed to light pink.
How do you measure the mass of NaOH?
NaOH is a hygroscopic compound. This means that it easily absorbs water from the air. This means that the mass of any solid “NaOH” sample that you measure will actually be a combination of NaOH and water. Since the fraction of NaOH that you’re weighing is unknown, you might as well use the less precise measuring device.