If the acid is monoprotic, the molar mass was calculated to be 58.94 g/mol, 117.9 g/mol if diprotic, and 176.8 g/mol if triprotic. The molarity of the NaOH solution was calculated to be 1.003M, the average molarity of the first two trials.Oct 5, 2017
How do you find the molar mass of a Diprotic acid?, Since the acid is diprotic, you had half that number (0.00580 moles) for the acid. That’s just the amount of acid in 25 mL. The amount in the original 200 mL solution is 0.0464 moles. This means the molar mass will be 4.50 g / 0.0464 moles, or 97.0 g/mol.
Furthermore, How do you find the molarity of an unknown acid in a titration?, If the titrant and analyte have a 1:1 mole ratio, the formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base. (Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution.)
Finally, What is the molar mass of a Diprotic acid?, If the acid is monoprotic, the molar mass was calculated to be 58.94 g/mol, 117.9 g/mol if diprotic, and 176.8 g/mol if triprotic.
Frequently Asked Question:
How do you calculate the molar mass of an acid?
025 gram, but you want to find the molar mass, or the mass for one mole. So, set up another proportion: x/. 025 g = 1 mol/. 00315 mol, and you find that x = 7.94 grams, which is the molar mass of the acid.
How do you find the KA of a Diprotic acid?
for the acid. If you know the concentration of the of the acid, say it is 0.0027M and the Ka1 is 5.0×10−7 . Then you can set up your equation as follows; H2X –> H+1 + HX−1 with Ka1 = 5.0×10−7 Using the formula: Ka=(products) / (reactants):
How can you tell if an acid is Diprotic?
For a diprotic acid, you can find the first acid dissociation constant the same way as for a monoprotic acid. The second acid dissociation constant is the point halfway between the first equivalence point and the second equivalence point.
What is a Diprotic acid?
A diprotic acid is an acid that yields two H+ ions per acid molecule. Examples of diprotic acids are sulfuric acid, H2SO4, and carbonic acid, H2CO3.
How do you calculate the molar mass of a solution?
Step 1: List the known quantities and plan the problem. to calculate the molality of the solution. Then use the molality equation to calculate the moles of solute. Then divide the grams of solute by the moles to determine the molar mass.
How do you find the molar mass of sulfuric acid?
98.079 g/mol
Sulfuric acid / Molar mass
Go to periodic table and determine the atomic mass average (atomic weight) of each element. Multiply each atomic mass by the number of atoms in the formula. Add up the results of step three: 2.015+32.066+63.998 = 98.079 = molar mass of sulfuric acid.
How do you find the concentration of an unknown acid?
An acid-base titration is used to determine the unknown concentration of an acid or base by neutralizing it with an acid or base of known concentration. Using the stoichiometry of the reaction, the unknown concentration can be determined.
How do you find the concentration of an unknown solution?
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 find the concentration of an acid?
Step 3: Calculate the concentration of hydrochloric acid in mol/dm 3
- Concentration in mol/dm 3 =
- Concentration in mol/dm 3 =
- = 0.125 mol/dm 3
- Relative formula mass of HCl = 1 + 35.5 = 36.5.
- Mass = relative formula mass × amount.
- Mass of HCl = 36.5 × 0.125.
- = 4.56 g.
- So concentration = 4.56 g/dm 3
How do you identify an unknown acid?
The titration curve of an unknown weak acid with a strong base will be measured using a pH meter. From the titration curve, the equivalence point and the pKa of the acid will be found. The melting point of the solid acid will be found using a Meltemp.
Which experimental technique is best used to determine the concentration of an unknown acid?
An acid-base titration is an experimental procedure used to determined the unknown concentration of an acid or base by precisely neutralizing it with an acid or base of known concentration. This lets us quantitatively analyze the concentration of the unknown solution.
How do you find the molecular mass of h2 S o4?
Multiply the atomic weight of each element with the number of atoms of that particular element. Similarly, do it for all the elements in the molecule or compound. Add up all the values obtained in the above step. Then add the unit as grams/mole you will get the molecular mass of the substance.
What is the molar mass of the solute?
Mass of Solute and Molar Mass
The number of moles of solute = mass of solute ÷ molar mass of solute, where mass is measured in grams and molar mass (defined as the mass of one mole of a substance in grams) is measured in g/mol. If you don’t know the mass of the solute, weigh it on a scale and record the value.
What is a Diprotic acid Example?
Diprotic acids, such as sulfuric acid (H2SO4), carbonic acid (H2CO3), hydrogen sulfide (H2S), chromic acid (H2CrO4), and oxalic acid (H2C2O4) have two acidic hydrogen atoms. Triprotic acids, such as phosphoric acid (H3PO4) and citric acid (C6H8O7), have three.
How do you identify a Diprotic acid?
A diprotic acid is titrated with NaOH solution of known concentration. Molecular weight (or molar mass) is found in g/mole of the diprotic acid. Weighing the original sample of acid will tell you its mass in grams. Moles can be determined from the volume of NaOH titrant needed to reach the first equivalence point.
Is water a Diprotic acid?
Re: Water as a polyprotic acid
Water is not a polyprotic acid because you would start considering it from H2O and not OH-.
What is a Diprotic substance?
A diprotic acid is an acid that can donate two hydrogen ions (H+) or protons per molecule in an aqueous solution. Another name for a diprotic acid is a dibasic acid.