Question

Обчисліть масу ортофосфатної кислоти необхідної для нейтралізації розчину що містить 153,9 г барій гідроксиду.(не з гд'з)

Answer 1

Х г 153,9 г

2H3PO4 + 3Ba(OH)2 -> Ba3(PO4)2 + 6H2O

n=2 моль n=3 моль

М = 98 г/моль М = 171 г/моль

m= 196 г m=513 г

Х г Н3РО4 - 153,9 г Ва(ОН)2

196 г Н3РО4 - 513 г Ва(ОН)2

m(H3PO4) = 196 * 153,9 / 513 = 58,8 гг

Answer 2

Calculating the Mass of Orthophosphoric Acid Needed for Neutralization

To calculate the mass of orthophosphoric acid needed to neutralize a solution containing 153.9 g of barium hydroxide, we can use the following chemical equation for the neutralization reaction:

3 Ba(OH)2 + 2 H3PO4 → Ba3(PO4)2 + 6 H2O

From this equation, we can see that 3 moles of barium hydroxide react with 2 moles of orthophosphoric acid.

First, we need to calculate the number of moles of barium hydroxide present in 153.9 g. Then, we can use the mole ratio from the balanced chemical equation to find the moles of orthophosphoric acid required for neutralization.

Calculating Moles of Barium Hydroxide

The molar mass of barium hydroxide (Ba(OH)2) can be calculated as follows: - Molar mass of Ba = 137.33 g/mol - Molar mass of O = 16.00 g/mol - Molar mass of H = 1.01 g/mol

Molar mass of Ba(OH)2 = (137.33 + 2*16.00 + 2*1.01) g/mol = 171.35 g/mol

Now, we can calculate the moles of barium hydroxide: Moles of Ba(OH)2 = Mass of Ba(OH)2 / Molar mass of Ba(OH)2 Moles of Ba(OH)2 = 153.9 g / 171.35 g/mol

Calculating Moles of Orthophosphoric Acid

Using the mole ratio from the balanced chemical equation, we can determine the moles of orthophosphoric acid needed for neutralization.

According to the balanced chemical equation, 3 moles of barium hydroxide react with 2 moles of orthophosphoric acid.

Therefore, moles of H3PO4 = (2/3) * Moles of Ba(OH)2

Final Calculation

Now, we can calculate the mass of orthophosphoric acid needed using the moles of orthophosphoric acid and its molar mass.

Molar mass of H3PO4 = 97.99 g/mol

Mass of H3PO4 = Moles of H3PO4 * Molar mass of H3PO4

Let's perform the calculations based on the given information.