{"id":227991,"date":"2025-06-06T16:42:03","date_gmt":"2025-06-06T16:42:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=227991"},"modified":"2025-06-06T16:42:05","modified_gmt":"2025-06-06T16:42:05","slug":"how-will-you-prepare-50-ml-of-70-alcohol-solution","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/06\/how-will-you-prepare-50-ml-of-70-alcohol-solution\/","title":{"rendered":"How will you prepare 50 mL of 70% alcohol solution"},"content":{"rendered":"\n

How will you prepare 50 mL of 70% alcohol solution? 15 mL ethyl alcohol in 50 mL c 35 ml. ethyl alcohol in 50 ml solution solution B. 25 ml ethyl alcohol in 50 ml D. 45 ml ethyl alcohol in 50 ml solution solution 85 grams of<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

C. 35 mL ethyl alcohol in 50 mL solution<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u2705 Correct Answer: 35 mL ethyl alcohol in 50 mL solution<\/strong><\/h3>\n\n\n\n
\n\n\n\n

\ud83d\udcd8 Explanation<\/h3>\n\n\n\n

A 70% alcohol solution<\/strong> means that 70% of the final solution’s volume<\/strong> must be pure ethyl alcohol<\/strong>, and the remaining 30% must be water (or another suitable diluent).<\/p>\n\n\n\n

You are asked to prepare 50 mL<\/strong> of this solution, so you need to calculate how much of that 50 mL should be alcohol:Volume of alcohol=70% of 50 mL=0.70\u00d750=35 mL\\text{Volume of alcohol} = 70\\% \\text{ of } 50 \\text{ mL} = 0.70 \\times 50 = 35 \\text{ mL}Volume of alcohol=70% of 50 mL=0.70\u00d750=35 mL<\/p>\n\n\n\n

This means you need 35 mL of ethyl alcohol<\/strong>, and the rest (15 mL<\/strong>) will be water or diluent<\/strong> to reach a total volume of 50 mL.<\/p>\n\n\n\n

Let\u2019s now examine the options:<\/p>\n\n\n\n

    \n
  • A. 15 mL ethyl alcohol in 50 mL solution<\/strong> \u2192
    1550\u00d7100=30%\\frac{15}{50} \\times 100 = 30\\%5015\u200b\u00d7100=30% \u2192 \u274c Too low<\/li>\n\n\n\n
  • B. 25 mL ethyl alcohol in 50 mL solution<\/strong> \u2192
    2550\u00d7100=50%\\frac{25}{50} \\times 100 = 50\\%5025\u200b\u00d7100=50% \u2192 \u274c Still too low<\/li>\n\n\n\n
  • C. 35 mL ethyl alcohol in 50 mL solution<\/strong> \u2192
    3550\u00d7100=70%\\frac{35}{50} \\times 100 = 70\\%5035\u200b\u00d7100=70% \u2192 \u2705 Correct!<\/li>\n\n\n\n
  • D. 45 mL ethyl alcohol in 50 mL solution<\/strong> \u2192
    4550\u00d7100=90%\\frac{45}{50} \\times 100 = 90\\%5045\u200b\u00d7100=90% \u2192 \u274c Too high<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    \ud83d\udd2c Why It Matters:<\/h3>\n\n\n\n

    Accurate preparation of alcohol solutions is essential, especially in medical, laboratory, or cleaning applications. Too little alcohol may reduce its effectiveness as a disinfectant, while too much could be unnecessarily harsh or unsafe.<\/p>\n\n\n\n

    Therefore, to prepare 50 mL of 70% alcohol<\/strong>, you need to combine:<\/p>\n\n\n\n

      \n
    • 35 mL of ethyl alcohol<\/strong><\/li>\n\n\n\n
    • 15 mL of water or diluent<\/strong><\/li>\n<\/ul>\n\n\n\n

      Final volume: 50 mL of 70% alcohol solution<\/strong> \u2705<\/p>\n\n\n\n

      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

      How will you prepare 50 mL of 70% alcohol solution? 15 mL ethyl alcohol in 50 mL c 35 ml. ethyl alcohol in 50 ml solution solution B. 25 ml ethyl alcohol in 50 ml D. 45 ml ethyl alcohol in 50 ml solution solution 85 grams of The Correct Answer and Explanation is: C. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-227991","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=227991"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227991\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=227991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=227991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=227991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}