Question

Помогите решить пожалуйста!!Вопрос жизни и смерти!При анализе 60 г влажного почвенного образца были получены следующие данные. После неоднократного нагревания до 110°С и охлаждения в эксикаторе почвенный образец приобрел постоянную сухую массу, равную 45 г. Затем сухой почвенный образец несколько раз прокаливали в тигле до красного цвета, охлаждали в эксикаторе и взвешивали. После этого его масса стала равна 30 г. Подсчитайте процентное содержание воды и органических веществ в данном почвенном образце.

Answer 1

Влага удаленная---15 грамм, Сгоревшая органика ----15 грамм. Остаток после высушивания и прокаливания составляет ----30 грамм. Вот и все рассуждения. А теперь считаем.
60 грамм это 100 %, а 15 грамм ----это Х.
Х= 25 %.Итак, влаги было 25 %, органики было 25 % и остаток составляет 50 %. В сумме все составляет 100 %.

Answer 2

Analysis of Soil Sample

To calculate the percentage of water and organic matter in the given soil sample, we need to analyze the data provided.

The data obtained from the analysis of the 60g moist soil sample is as follows:

- After repeated heating to 110°C and cooling in a desiccator, the soil sample reached a constant dry mass of 45g. - Subsequently, the dry soil sample was heated in a crucible until it turned red, cooled in a desiccator, and weighed again. The mass of the sample after this process was 30g.

Calculation of Water Content

To calculate the percentage of water content in the soil sample, we can use the following formula:

Water Content (%) = ((Initial Mass - Dry Mass) / Initial Mass) * 100

Where: - Initial Mass is the mass of the moist soil sample (60g). - Dry Mass is the mass of the soil sample after reaching a constant dry mass (45g).

Using the provided data, we can calculate the water content as follows:

Water Content (%) = ((60g - 45g) / 60g) * 100

Calculating this equation, we find that the water content in the soil sample is approximately 25%.

Calculation of Organic Matter Content

To calculate the percentage of organic matter in the soil sample, we can use the following formula:

Organic Matter Content (%) = ((Dry Mass - Final Mass) / Dry Mass) * 100

Where: - Dry Mass is the mass of the soil sample after reaching a constant dry mass (45g). - Final Mass is the mass of the soil sample after heating in a crucible until it turned red and cooling (30g).

Using the provided data, we can calculate the organic matter content as follows:

Organic Matter Content (%) = ((45g - 30g) / 45g) * 100

Calculating this equation, we find that the organic matter content in the soil sample is approximately 33.33%.

Conclusion

Based on the analysis of the provided data, the soil sample has a water content of approximately 25% and an organic matter content of approximately 33.33%.