超わかる！授業動画

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【衝撃】電離でH+は出ていない!!【高校化学】酸と塩基

オキソニウムイオンとは！ ✅水分子には＋や－の電気を帯びている！ ✅－の電気を持っているものには、水分子の＋部分が集まって引き離す！ ✅＋の電気を持っているものには、水分子の－部分が集まって引き離す！...

2021-03-12 18:00:14 有 7,157 人看過有 215 人說讚

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電離のしくみを４分で解説します【高校化学】酸と塩基

電離のしくみを理解するためのポイントは！ ✅水分子には＋や－の電気を帯びている！ ✅－の電気を持っているものには、水分子の＋部分が集まって引き離す！ ✅＋の電気を持っているものには、水分子の－部分が集...

2021-03-10 18:00:02 有 7,158 人看過有 152 人說讚

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【証明】正弦定理【高校数学】公式の証明＃８

正弦定理を証明します。 ✅「正弦定理」の授業動画授業動画▶https://youtu.be/eTGqgHnjCAU センター試験（過去問解説）▶https://youtu.be/On4TqHYAO...

2021-03-08 18:00:06 有 9,846 人看過有 409 人說讚

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三角形の合同条件│証明のコツ【中学数学】平面図形＃７

三角形の合同条件のなぜ？証明のポイントは！ ✅合同とは「形」も「大きさ」も同じこと ✅合同な図形の対応する辺の長さや角の大きさは等しくなる ✅「三本線”≡”は合同」「二本線”=”は面積が同じ」という意...

2021-03-06 18:00:29 有 6,105 人看過有 215 人說讚

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なぜ『外角の和＝360°』になるの？【中学数学】平面図形＃６

多角形の外角の和が360°になる理由を証明します。 🎥前の動画🎥 ✅なぜ『三角形の内角の和＝180°』になるの？ ▶https://youtu.be/PerKwCMnxKo 🎥次の動画🎥 準備中で...

2021-03-01 18:00:12 有 5,285 人看過有 202 人說讚

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酸・塩基２つの定義【高校化学】酸と塩基＃１

酸塩基の２つの定義のポイントは！ ✅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。 ✅２つ目の定義はブレンステッドの定義。酸は、H＋を渡すもの...

2021-02-27 08:00:26 有 15,117 人看過有 497 人說讚

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なぜ『三角形の内角の和＝180°』になるの？【中学数学】平面図形＃５

三角形の内角の和が180°になる理由を証明します。 🎥前の動画🎥 ✅多角形の内角・外角 ▶https://youtu.be/4kMMtPXPxfY 🎥次の動画🎥 ✅なぜ『外角の和＝360°』になる...

2021-02-22 18:00:08 有 8,446 人看過有 353 人說讚

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純度【高校化学】化学反応式＃３

純度のポイントは！ ✅純度とは、全体のｇのうち、その物質が何ｇ含まれているかの割合のこと！ ✅化学反応がらみの問題は「はじめのmol」「反応量のmol」「おわりのmol」の表を書くとうまくいく！ 🎥...

2021-02-19 18:00:31 有 4,717 人看過有 84 人說讚

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化学反応の量的関係【高校化学】化学反応式＃2

化学反応の量的関係のポイントは！ ✅化学反応がらみの問題は「はじめのmol」「反応量のmol」「おわりのmol」の表を書くとうまくいく！ ✅molじゃない場合はｍolに変換して表を埋めよう！ 🎥この...

2021-02-17 18:00:13 有 15,791 人看過有 318 人說讚

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多角形の内角・外角【中学数学】平面図形＃４

多角形の内角・外角のポイントは！ ✅直線で囲まれた図形のことを『多角形』という ✅多角形の内側の角のことを『内角』という ✅三角形の内角の和＝180° ✅多角形の内角の和＝180° × (多角形の数字...

2021-02-15 18:00:01 有 5,708 人看過有 198 人說讚