Question

Опыт. Тебе потребуются: вода из крана, спиртовка, стекло, пипетка, держатель. 1. Капни на стекло несколько капель воды и нагрей это стекло над пламенем 2. Подержи стекло над спиртовкой до тех пор, пока вода не испарится. 3. Обрати внимание на образование бе- лых разводов на стекле от воды. Предполо- жи, почему от воды остались белые разво- ды? Сделай вывод. 4. Запиши вывод в тетради. помогите пожалуйста можете по быстрее дам 35баллов​

Answer 1

Ответ:

так как в вода не чистая, в ней находится минералы.

Объяснение:

например накипь в чайнике это тоже самое)

Answer 2

Experiment: Observing the Formation of White Streaks on Glass

To answer your question, let's go through the steps of the experiment and discuss the observations and conclusions.

1. Drop a few drops of water on the glass: - Take a glass and add a few drops of water onto it.

2. Heat the glass over a flame: - Hold the glass over a flame, ensuring that the water on the glass is exposed to the heat.

3. Observe the formation of white streaks: - Pay attention to the glass and observe any white streaks that form as the water evaporates.

4. Analyze the formation of white streaks: - Consider why white streaks are formed on the glass after the water evaporates.

Observations and Conclusions

After performing the experiment, you may have observed the following:

- The water droplets on the glass evaporated when heated. - White streaks formed on the glass surface after the water evaporated.

The formation of white streaks on the glass can be explained by the presence of impurities in the water. When the water evaporates, these impurities are left behind, resulting in the formation of white streaks.

The white streaks are likely caused by minerals or other substances dissolved in the water. As the water evaporates, these substances become more concentrated and form visible deposits on the glass surface.

Conclusion

Based on the observations and the known properties of water, we can conclude that the white streaks on the glass are formed due to the presence of impurities in the water. When the water evaporates, these impurities are left behind, resulting in the formation of visible deposits on the glass surface.

Please note that this conclusion is based on the information provided and the general understanding of the topic. If you require more specific information or have any further questions, feel free to ask!