Question

Hᴏᴡ ᴍᴀɴʏ ɢʀᴀᴍs ᴏғ ɢʟᴜᴄᴏs ᴀʀᴇ ɴᴇᴇᴅᴇᴅ ᴛᴏ ᴘʀᴇᴘᴀʀᴇ 400ᴍʟ ᴏғ 5%ɢʟᴜᴄᴏs sᴏʟᴜᴛɪᴏɴ

Answer 1

Given :

Mass by volume percentage = 5%

Volume of solution = 400ml

To Find :

Amount of glucose present in the solution.

Solution :

❒ Mass by volume percentage concentration of solution is defined as the amount of solute in grams dissolved present 100ml of solution.

$\bigstar\:\underline{\boxed{\bf{\red{\%w/V=\dfrac{Mass\:of\:solute}{Volume\:of\:solution}\times100}}}}$

Symbol : $\sf{\%w/V}$

Unit : g/ml

Let mass of glucose present in the solution be x.

By substituting the given values;

$\sf:\implies\:5=\dfrac{x}{400}\times 100$

$\sf:\implies\:x=\dfrac{5\times 400}{100}$

$\sf:\implies\:x=5\times4$

$:\implies\:\underline{\boxed{\bf{\purple{x=20\:grams}}}}$