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<div id="bd8lmiie" class="ly_crumb"> <img src="/skins/342860/images/crumb_icon.png" /><p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>PH是什么</span></p> </div>   <div id="bd8lmiie" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">PH是什么</h1> <div id="bd8lmiie" class="NyNewsdetail_tips">更新時(shí)間：2024-03-01 點(diǎn)擊次數：744</div> <div id="bd8lmiie" class="NyNewsdetail_con"> <div data-v-3f070ee8="" class="text" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin: 8px 0px; padding: 0px; font-size: 16px; line-height: 32px; color: rgb(51, 51, 51); font-family: Arial, Helvetica, sans-serif; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span data-v-3f070ee8="" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box;">PH是指溶液的酸堿度，也稱(chēng)為氫離子濃度指數，是用來(lái)衡量溶液酸堿性強弱的一個(gè)指標。它表示水溶液中氫離子活度的負對數，即pH=-lg[H+]，其中[H+]指的是溶液中氫離子的物質(zhì)的量濃度。在25的溫度下，當pH值=7時(shí)，溶液呈中性；當pH<7時(shí)，溶液呈酸性，pH值越小表示酸性越強；當pH>7時(shí)，溶液呈堿性，pH值越大表示堿性越強。</span></div><div data-v-3f070ee8="" class="text" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin: 8px 0px; padding: 0px; font-size: 16px; line-height: 32px; color: rgb(51, 51, 51); font-family: Arial, Helvetica, sans-serif; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span data-v-3f070ee8="" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box;">PH值的測定有多種方法，包括比色法、玻璃電極法等。其中，使用PH試紙是一種常見(jiàn)且簡(jiǎn)便的方法，只需將試紙浸入待測溶液中，根據試紙顏色的變化來(lái)對照標準比色卡，即可測得溶液的PH值。</span></div><div data-v-3f070ee8="" class="text" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin: 8px 0px; padding: 0px; font-size: 16px; line-height: 32px; color: rgb(51, 51, 51); font-family: Arial, Helvetica, sans-serif; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span data-v-3f070ee8="" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box;">PH值在許多領(lǐng)域都有廣泛的應用，如環(huán)境監測、醫療衛生、農業(yè)生產(chǎn)等。在環(huán)境監測中，PH值是衡量水質(zhì)污染程度的重要指標之一。在醫療衛生領(lǐng)域，人體血液的PH值對于維持生命活動(dòng)具有重要意義。在農業(yè)生產(chǎn)中，土壤和肥料的PH值對于作物的生長(cháng)和產(chǎn)量也有重要影響。</span></div><div data-v-3f070ee8="" class="text" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin: 8px 0px; padding: 0px; font-size: 16px; line-height: 32px; color: rgb(51, 51, 51); font-family: Arial, Helvetica, sans-serif; text-wrap: wrap; background-color: rgb(255, 255, 255);"><span data-v-3f070ee8="" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box;">總之，PH值是表示水溶液中氫離子活度的一種標度，是衡量溶液酸堿性強弱的重要指標，具有廣泛的應用價(jià)值。</span></div><p><br/></p> </div> <div id="bd8lmiie" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-3622494.html">總氯是什么</a></li> <li>下一篇：<a 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