determine which choice(s) is/are correct?

i. stirring slows down (decreases) rate of dissolution.
ii. grinding solids increases their surface area of contact.
iii. heating slows down (decreases) rate of dissolution.
iv. grinding solids speeds up their rate of dissolution.
a) i, ii, and iii
b) ii and iv
c) i and iii
d) iii and iv

B) 2 AND 4 as rate of rxn is directly proportional to surface of contact smaller the particle faster the rxn

answer; blank (1); /// (2)///(3)///highblank(4)//low;

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.