Question

2.8 grams of KoH is dissolved in water to give 200 cm^3 of solution . calculate the morality of the solution​

Answer 1

Explanation:

please marks as brainslist

Answer 2

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$\huge\fcolorbox{black}{aqua}{Solution:-}$

✒ᴀɴsᴡᴇʀ:-

⛄ ᴍᴏʟᴀʀɪᴛʏ ᴏғ ᴛʜᴇ sᴏʟᴜᴛɪᴏɴ- 0.25 ᴍ.

✒ ᴇxᴘʟᴀɴᴀᴛɪᴏɴ:-

⛄ 200 ᴄᴄ = 200 ᴍʟ = 0.200 ʟ

ᴀɴ 1 ᴍᴏʟᴀʀ sᴏʟᴜᴛɪᴏɴ ɪs ᴀ sᴏʟᴜᴛɪᴏɴ ɪɴ ᴡʜɪᴄʜ 1 ᴍᴏʟᴇ ᴏғ ᴀ ᴄᴏᴍᴘᴏᴜɴᴅ ɪs ᴅɪssᴏʟᴠᴇᴅ ɪɴ ᴀ ᴛᴏᴛᴀʟ ᴠᴏʟᴜᴍᴇ ᴏғ 1 ʟɪᴛʀᴇ.

sᴏʟᴠɪɴɢ ғᴏʀ ᴛʜᴇ ɴᴜᴍʙᴇʀ ᴏғ ᴍᴏʟᴇs ɪɴ 2.8 ɢ ᴏғ ᴋᴏʜ.

ᴋ = 39 ᴏ = 16 ʜ = 1 ᴍᴏʟᴀʀ ᴍᴀss ᴏғ ᴋᴏʜ = 56 ɢ

2.8 ɢ / 56 ɢ ᴘᴇʀ ᴍᴏʟᴇ = 0.05 ᴍᴏʟᴇs

ɪғ 0.05 ᴍᴏʟᴇs ᴏғ ᴋᴏʜ ɪs ᴅɪssᴏʟᴠᴇᴅ ɪɴ 0.200 ʟ ᴏғ ᴡᴀᴛᴇʀ ᴡᴇ ɢᴇᴛ 0.05 ᴍᴏʟᴇs / 0.200 ʟ >>>> 0.25 ᴍᴏʟᴇs / ʟɪᴛᴇʀ

sᴏ 2.8 ɢ ᴏғ ᴋᴏʜ ɪɴ 200 ᴍʟ sᴏʟᴜᴛɪᴏɴ ɪs 0.25 ᴍᴏʟᴀʀ sᴏʟᴜᴛɪᴏɴ.

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