Determination And Separations of Gold in the Electrolytic Way
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After one and one-half hours the level of the liquid was raised and the current increased to N. D 100 = 0. 12 A and 2. 5 V. There was no further deposition of metal.
The deposit was brown, and in washing, with the alcohol and ether, some of it was detached. The current used had evidently been too strong.
21 Other experiments followed, using a lower current; in these the deposits, although more compact and adherent, warm water only was used for washing, were not of bright yellow color. Dark spec...ks appeared on the deposits. In weighing them, they were all found to be nearly 0. 0008 gram too heavy.
The test made for phosphoric acid in the deposited gold failed to reveal its presence.
A solution of disodium hydrogen phosphate and free phosphoric acid was electrolysed, but gave no deposit.
Gently igniting the dish containing the deposit, by passing it several times over a small flame of a Bunsen burner, gave a bright yellow deposit of gold.
A deposit weighing 0. 0858 gram was thus treated, and weighed 0.
What to read after Determination And Separations of Gold in the Electrolytic Way?
You can find similar books in the "Read Also" column, or choose other free books by Sarah Pleis Miller to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
After one and one-half hours the level of the liquid was raised and the current increased to N. D 100 = 0. 12 A and 2. 5 V. There was no further deposition of metal.
The deposit was brown, and in washing, with the alcohol and ether, some of it was detached. The current used had evidently been too strong.
21 Other experiments followed, using a lower current; in these the deposits, although more compact and adherent, warm water only was used for washing, were not of bright yellow color. Dark spec...ks appeared on the deposits. In weighing them, they were all found to be nearly 0. 0008 gram too heavy.
The test made for phosphoric acid in the deposited gold failed to reveal its presence.
A solution of disodium hydrogen phosphate and free phosphoric acid was electrolysed, but gave no deposit.
Gently igniting the dish containing the deposit, by passing it several times over a small flame of a Bunsen burner, gave a bright yellow deposit of gold.
A deposit weighing 0. 0858 gram was thus treated, and weighed 0.
What to read after Determination And Separations of Gold in the Electrolytic Way?
You can find similar books in the "Read Also" column, or choose other free books by Sarah Pleis Miller to read onlineMoreLess
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