<p>Tomorrow, I have to take a lab practical in which unknown compounds will be given and I have to identify them. </p>
<p>Will knowing the basic anion tests (co3, po4, so3, so4, cl, no) and all the cation flame tests put in a good position?</p>
<p>Also, how do you tell the difference between Na and Ca? Both flame tests produce an orangish color.</p>