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GlobalLabGlobal Student Laboratory
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ЖиВаЯ ПлАнЕтА
Group motto:
Зеленая планета – живая планета!
About this group:
Группа объединяет учащихся 5х классов МБОУ "Осыпнобугорская СОШ", посещающих экологический кружок "Живая планета"
- Group leaders
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Dilyara Lukmanova
Диляра Насыровна, учитель химии
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Participating in 28 projects
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pH & Temperature
What if you measure the pH of a chilled solution that you just removed from the refrigerator, and somewhere else, others measured the pH of the same solution but at room temperature on a warm day? Does the temperature of a solution affect its pH? If so, what does this mean for our investigations into pH? Should we measure pH when the solutions are at the same temperature?
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Крахмал в продуктах? Найдём легко!
Крахмал – это сложный углевод. Он необходим нашему организму для нормального функционирования. Именно углеводы являются источником энергии для организма. Почти все фрукты, овощи, бобовые и злаки содержат в своем составе крахмал в том или ином количестве. Именно от этого и зависит их энергетическая ценность.
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Getting on the Same Page: Calibration
When we look for answers in GlobalLab, we base our conclusions on data we all submit. But when we use probes and sensors, and since each of us uses our own instruments to collect data, how can we know whether our findings can be compared? How do we know our instruments even measure their target, in this case pH, or measure with comparable accuracy? What can be done so we can trust each other’s findings? For pH measurements scientists use a procedure called the calibration of pH probes. We check how accurately our probes and sensors measure pH by first measuring so-called ‘standard solutions,’ those with pH values we already know, since we either prepared them ourselves or purchased them from chemical catalogs.
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