How would you prepare a 0.025M of phosphoric acid?

Answer 1

Source: Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0 Source:Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0 Source:Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0 Source:Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0 Source:Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0 Source:Sörensen; in Hayat, 1986.

---- 0.2 M Monobasic Stock

Combine

13.9 g sodium phosphate monobasic

500 mL dH20

0.2 M Dibasic Stock

Combine

53.65 g sodium phosphate dibasic heptahydrate (or 28.4 g of the anhydrous form)

1 L dH20

0.1 M Buffer

To make buffer, combine the following quantities of each stock and add dH2O to bring up to 600 ml:

monobasic dibasic pH(ml) (ml) 280.5 19.5 5.7 276 24 5.8 270 30 5.9 263.1 36.9 6.0 255 45 6.1 244.5 55.5 6.2 232.5 67.5 6.3 220.5 79.5 6.4 205.5 94.5 6.5 187.5 112.5 6.6 169.5 130.5 6.7 153 147 6.8 135 165 6.9 117 183 7.0 99 201 7.1 84 2167.2 69 231 7.3 57 243 7.4 48 252 7.5 39 261 7.6 31.5 271.5 7.7 25.5 274.5 7.8 21 279 7.9 15.9 284.1 8.0

Answer 2

If the acid was 100% phosphoric acid I would pour 4 ml into an empty and at least 150 ml beaker. Then I would carefully measure, by graduated cylinder or from a buret, 96 ml to put into the beaker with the 4 ml to make 100 ml of solution.

Answer 3

If you are using 85% phosphoric acid, its conc is 14.7M. Thus, (N1)(V1) = (N2)(V2) , If you want a liter of 0.1M H3PO4, then (14.7)(V1) = (0.1)(1000) V1 = 6.8 ml

Answer 4

get one mole of the acid and add it to solvent 1 L.

Answer 5

Take 1.8 mL of 85% (wt.) phosphoric acid into 1 L of water

Answer 6

0.7 ml of 85% phosphoric acid into 1000 mL= 0.01 M of phosphoric acid

Answer 7

If you are using 85% phosphoric acid, its conc is 14.7M. Thus,

(N1)(V1) = (N2)(V2) , If you want a liter of 0.1M H3PO4, then

(14.7)(V1) = (0.1)(1000)

V1 = 6.8 ml

Answer 8

Dissolve 0,46 g methanoic (formic) acid in 1 L water.

Answer 9

Mix 0,227 mL of 85 % ortho-phosphoric acid with 1 L demineralized water.

Answer 10

preparation of 0.1 molar nitric acid