How many grams of NaCl should be obtained to make 150 mL of 4.5 M solution

Chemistry

1 answer:

nadya68 [22]3 years ago

3 0

Answer:

39,5 grams should be obtained of NaCl

Explanation:

We calculate the weight of 1 mol of NaCl:

Weight 1 mol NaCl= Weight Na + Weight Cl= 23g + 35,5g=58,5 g/mol

4,5M--> 4,5 moles NaCl in 1000ml (1L) of solution

1000ml-----4,5 moles NaCl

150 ml------x=(150 mlx4,5 moles NaCl)/1000ml=0,675 moles NaCl

1 mol NaCl--------------58,5 grams

0,675molesNaCl---x= (0,675molesNaClx58,5 grams)/1 mol NaCl

x= 39,4879 grams

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