Question

$\huge\bigstar\bold\red{question}$Find the percentage mass of water in the epsom salt MgSO4.7H2O no spamming..​

Answer 1

Answer:

THE BRAINLIEST ANSWER!

Formula of EPSOM salt = MgSO4.7H2O

molecular mass of MgSO4.7H2O = atomic mass of Mg + atomic mass of S + 4 × atomic mass of O + 7 { 2 × atomic mass of H + atomic mass of O }

= 24 + 32 + 4× 16 + 7{ 2 × 1 + 16 } g/mol

= (24 + 32 + 64+ 126 ) g/mol

= 246 g/mol

molecular mass of total water = 7 × ( 2× atomic mass of H + atomic mass of O )

= 7 × 18 = 126 g/mol

now ,

% mass of H2O in EPSOM salt = {total molar mass of H2O/molar mass of Epsom salts }× 100

= {126/246 } × 100

= 12600/246

= 51.21 %

Hope it HELPS....❤

Answer 2

$\sf\underbrace{\red{To\:Find:-}}$

• The percentage mass of water in the Epsom Salt .

$\sf\underbrace{\red{SOLUTION:-}}$

☞ Formula of Epsom Salt is,

$\checkmark\:\tt{\underline{\purple{\boxed{MgSO_{4}.7H_2O}\:}}}$

☞ Molecular mass of Epsom Salt is,

$\tt{=\:24\:+\:32\:+\:64\:+\:126\:}$

$\tt{=\:246\:g/mol}$

☞ Molecular mass of total water is,

$\tt{=\:7\times18\:}$

$\tt{=\:126\:g/mol\:}$

☞ Now, %mass of Water in Epsom Salt is,

$\bigstar\:\sf{\underline{\green{\boxed{{\dfrac{Total\:Molar\:mass\:of\:H_2O}{Molar\:mass\:of\:Epsom\:salt}}\:\times{100}\:}}}}$

$\tt{=\:{\dfrac{126}{246}}\:\times{100}\:}$

$\tt{=\:{\dfrac{12600}{246}}\:}$

$\tt{=\:51.21\:}$%

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♻️ Hence, The percentage mass of water in the Epsom Salt is “51.21%” .

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