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酸化剤と還元剤【高校化学】酸化還元#2

酸化剤・還元剤のポイントをまとめるよ! ✅酸化還元の定義は、 ・電子を失ったら酸化された! ・電子を受け取ったら還元された! ↓言い換えると↓ ・酸化数が増えたら酸化された! ・酸化数が減ったら還元さ...

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【証明】部屋割り論法・鳩の巣原理【高校数学】公式の証明#17

部屋割り論法・鳩の巣原理を利用する問題を証明します。 ✅整数の性質の再生リストはコチラ! https://www.youtube.com/playlist?list=PLd3yb0oVJ_W0T_e...

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酸化数の求め方【高校化学】酸化還元#1

酸化数の求め方のポイントをまとめるよ! ✅酸化数の基本ルールは、2つ! ❶1族元素の酸化数は+1。 2族元素は+2。 17族元素は―1。 酸素は―2。としてOK ❷全体の酸化数は化学式の右肩の数。 ...

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【証明】素数は無限に多く存在する【高校数学】公式の証明#16

素数は無限に多く存在することを証明します。 ✅「背理法」の授業動画 授業動画▶https://youtu.be/sjgCSAblm3c 【九州大】過去問▶https://youtu.be/Ea3WT...

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【知識ゼロ➡無双】「酸と塩基」はじめから丁寧にアニメ解説。初学者でも余裕で満点!【高校化学・化学基礎】酸と塩基#10

酸と塩基のポイントを全てまとめていくよ! ⏱タイムコード⏱ 00:00 ❶酸と塩基の2つの定義 ✅1つ目の定義はアレニウスの定義。 酸は、水に溶けてH+を出すもの 塩基は、水に溶けてOH-を出すもの...

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逆滴定【高校化学】酸と塩基#9

逆滴定のポイントをまとめるよ! ✅気体の物質を滴定したいときに逆滴定を行う! ✅過剰に用意した濃度が分かっている酸と一旦全部反応させておいて、 残った部分を濃度が分かっている塩基でぴったり中和させる。...

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二段滴定|炭酸ナトリウム+塩酸【高校化学】酸と塩基#8

二段滴定のポイントをまとめるよ! ✅中和滴定の流れは! ❶はじめに、炭酸ナトリウムの水溶液がある。 ❷塩酸を加えると、だんだん炭酸水素ナトリウムに変化する。 ❸さらに塩酸を加え続けると、だんだん炭酸に...

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【素数判定法】エラトステネスのふるい

素数の簡単な見つけ方を紹介。エラトステネスのふるいとよばれる古代ギリシャの素数判定法を使えば、誰でも簡単に素数を見つけることができます。 ✅エラトステネスのふるいの使い方 ※ 1 から 100 まで...

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中和滴定と滴定曲線【高校化学】酸と塩基#7

中和滴定と滴定曲線のポイントをまとめるよ! ✅中和滴定の流れは! ❶「メスフラスコ」で酸の濃度を決める。 ❷「ホールピペット」で酸の量を決める。 ❸「コニカルビーカー」で反応させる場所を用意する。 ❹...

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【世界が変わる裏技】「÷5」「×5」を一瞬で暗算する計算テクニック!

「×5」「÷5」を普通に計算するのがアホらしくなる瞬間暗算法を紹介!この暗算テクニックは無理な暗記が一切ないので小学生でも今すぐ習得することができる反則級の裏技テクニックです!「×5」「÷5」の計算は...