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هنگامی که سدیم هیدروکسید (NaOH) به محلولی حاوی فنل‌فتالئین افزوده می‌شود، محیط محلول قلیایی شده و فنل‌فتالئین به رنگ صورتی یا ارغوانی زیبایی تغییر رنگ می‌دهد.
🌸 این واکنش یکی از آزمایش‌های جذاب شیمی برای نشان دادن تغییرات pH است! 🧪🌈
هنگامی که سدیم هیدروکسید (NaOH) به محلولی حاوی فنل‌فتالئین افزوده می‌شود، محیط محلول قلیایی شده و فنل‌فتالئین به رنگ صورتی یا ارغوانی زیبایی تغییر رنگ می‌دهد.
🌸 این واکنش یکی از آزمایش‌های جذاب شیمی برای نشان دادن تغییرات pH است! 🧪🌈
But Telegram says people want to keep their chat history when they get a new phone, and they like having a data backup that will sync their chats across multiple devices. And that is why they let people choose whether they want their messages to be encrypted or not. When not turned on, though, chats are stored on Telegram's services, which are scattered throughout the world. But it has "disclosed 0 bytes of user data to third parties, including governments," Telegram states on its website. Despite Telegram's origins, its approach to users' security has privacy advocates worried. Groups are also not fully encrypted, end-to-end. This includes private groups. Private groups cannot be seen by other Telegram users, but Telegram itself can see the groups and all of the communications that you have in them. All of the same risks and warnings about channels can be applied to groups. "The argument from Telegram is, 'You should trust us because we tell you that we're trustworthy,'" Maréchal said. "It's really in the eye of the beholder whether that's something you want to buy into." Ukrainian forces have since put up a strong resistance to the Russian troops amid the war that has left hundreds of Ukrainian civilians, including children, dead, according to the United Nations. Ukrainian and international officials have accused Russia of targeting civilian populations with shelling and bombardments.
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