| British Weights and Measures. | or | Metrical Weights and Measures. | |||||
| Grains weight of substance. | = | Grain- measures of vol. sol. | Grams weight of substance. | = | C. C. of vol. sol. | ||
| Ammoniæ carb. | 59·0 | = | 1000 | or | 5·90 | = | 100·0 |
| Borax | 191·0 | = | 1000 | ” | 19·10 | = | 100·0 |
| Liq. ammon. | 85·0 | = | 500 | ” | 8·50 | = | 50·0 |
| Liq. ammon. fort. | 52·3 | = | 1000 | ” | 5·23 | = | 100·0 |
| Liq. calcis | 4380·0 | = | 200 | ” | 438·00 | = | 20·0 |
| Liq. calcis sacchar | 460·2 | = | 254 | ” | 46·02 | = | 25·4 |
| Liq. plumbi subacet. | 413·3 | = | 810 | ” | 41·33 | = | 81·0 |
| Liq. potassæ | 462·9 | = | 482 | ” | 46·29 | = | 48·2 |
| Liq. potassæ efferves. | 4380·0 | = | 150 | ” | 438·00 | = | 15·0 |
| Liq. sodæ | 458·0 | = | 470 | ” | 45·80 | = | 47·0 |
| Liq. sodæ efferves. | 4380·0 | = | 178 | ” | 438·00 | = | 17·8 |
| Plumbi acetas | 38·0 | = | 200 | ” | 3·80 | = | 20·0 |
| Potassa caustica | 56·0 | = | 900 | ” | 5·60 | = | 90·0 |
| Potassæ bicarb. | 50·0 | = | 500 | ” | 5·00 | = | 50·0 |
| Potassæ carb. | 83·0 | = | 980 | ” | 8·30 | = | 98·0 |
| Potassæ citras | 102·0 | = | 1000 | ” | 10·20 | = | 100·0 |
| Potassæ tartras | 113·0 | = | 1000 | ” | 11·30 | = | 100·0 |
| Potassæ tartras acida | 188·0 | = | 1000 | ” | 18·80 | = | 100·0 |
| Soda caustica | 40·0 | = | 900 | ” | 4·00 | = | 90·0 |
| Soda tartarata | 141·0 | = | 1000 | ” | 14·10 | = | 100·0 |
| Sodæ bicarb. | 84·0 | = | 1000 | ” | 8·40 | = | 100·0 |
| Sodæ carb. | 143·0 | = | 960 | ” | 14·30 | = | 96·0 |
Volumetric Solution of Soda (hydrate of soda, NaO, HO = 40, or NaHO = 40).
| Take of solution of soda | a sufficiency. |
| Distilled water | a sufficiency. |
Fill a burette with the solution of soda, and cautiously drop this into 63 gr. of purified oxalic acid, dissolved in about 2 oz. of water, until the acid is exactly neutralised as indicated by litmus.
Note the number of grain-measures (n) of the solution used, and having then introduced 9000 grain-measures of the solution of soda in a graduated jar, augment this quantity by the addition of water until it becomes
9000 × 1000 / n grain-measures =
If, for example, n = 930, the 9000 grain-measures should be augmented to
9000 × 1000 / 930 = 9,677 grain-measures.
One thousand grain-measures of this solution contain one equivalent in grains (40 gr.) of hydrate of soda, and will therefore neutralise one equivalent in grains of any monobasic acid.
Grammes and cubic centimètres may be employed, instead of grains and grain-measures; but for convenience 1⁄10th of the numbers should be taken. 1000 cubic centimètres contain 1⁄10th of an equivalent in grammes (4 grammes) of hydrate of soda, and will neutralise 1⁄10th of an equivalent in grammes of an acid.